There are four possible answers to this question, but the correct answer is (a) the steps would be the complementary base pairs, and the handrail would be the sugar-phosphate backbone.
The complementary base pairs are the nucleotide bases that form the steps of the DNA ladder. There are four types of nucleotide bases in DNA: adenine (A), thymine (T), cytosine (C), and guanine (G). Adenine pairs with thymine, and cytosine pairs with guanine, forming the base pairs that make up the steps of the DNA ladder.
The sugar-phosphate backbone, on the other hand, forms the handrail of the DNA ladder. Each nucleotide consists of a sugar molecule, a phosphate group, and a nucleotide base. The sugar molecules and the phosphate groups alternate to form the backbone of the DNA molecule. The sugar molecules are deoxyribose, which is a five-carbon sugar, and the phosphate groups are negatively charged. The negative charges on the phosphate groups repel each other, causing the sugar-phosphate backbone to have a spiral shape.
Learn more about sugar-phosphate backbone at : https://brainly.com/question/12091975
#SPJ4
the only arteries in the body that carry oxygen-poor blood are the coronary arteries.T/F
False. The arteries in the body that carry oxygen-poor blood are not the coronary arteries. The arteries that carry oxygen-poor blood are called as the pulmonary arteries.
Arteries are blood vessels that carry oxygenated blood away from the heart to the tissues of the body. The exception to this is the pulmonary arteries, which carry deoxygenated blood from the heart to the lungs for oxygenation. The coronary arteries are a network of arteries that supply the heart muscle with oxygenated blood. The heart muscle requires a constant supply of oxygen to function properly, and the coronary arteries are responsible for delivering this oxygenated blood to the heart muscle. Therefore, the statement "the only arteries in the body that carry oxygen-poor blood are the coronary arteries" is false.
To read more on pulmonary artery, click here https://brainly.com/question/2729417
#SPJ4
A cell that has two copies of each chromosome, one from an egg and one from sperm is known as _____.
A cell that has two copies of each chromosome, one from an egg and one from sperm, is known as a diploid cell.
In most sexually reproducing organisms, including humans, the process of fertilization involves the fusion of a haploid sperm cell and a haploid egg cell, resulting in the formation of a diploid zygote. The zygote then undergoes mitosis, a process of cell division that results in the formation of new cells, each with the same number of chromosomes as the original cell.
In diploid cells, the two copies of each chromosome are referred to as homologous chromosomes. One homologous chromosome is inherited from the individual's mother, and the other is inherited from the father. This provides genetic diversity and variability in the offspring.
Diploid cells are found in most somatic cells of the body, with the exception of a few specialized cells, such as gametes (sperm and egg cells), which are haploid. In summary, a cell that has two copies of each chromosome, one from an egg and one from sperm, is known as a diploid cell.
Learn more about diploid cells here:
https://brainly.com/question/12984037
#SPJ4
Carbohydrates are universally used as an immediate energy source and they play structural roles for a variety of organisms. True/False?
It is True that carbohydrates are universally used as an immediate energy source and they play structural roles for a variety of organisms.
Carbohydrates are an important source of energy for many living organisms, from single-celled bacteria to multicellular animals like humans. They are broken down during cellular respiration to produce ATP, which is used by cells for various metabolic processes.
In addition to their energy-storage function, carbohydrates also have structural roles in many organisms. For example, cellulose, which is a type of carbohydrate, makes up the cell walls of plants and provides them with structural support. Chitin, another type of carbohydrate, makes up the exoskeletons of insects and crustaceans and provides them with protection and support.
Know more about Carbohydrates here: https://brainly.com/question/29775112
#SPJ4
You are studying cellular respiration in biology. Your lab partner finds this model of aerobic respiration, but is confused as to what is
happening. She asks you for your help. Examine the model. What statements would help clarify the process of aerobic cellular
respiration? Choose ALL that apply.
A) Aerobic respiration requires glucose and oxygen.
B) Aerobic respiration produces ATP from glucose and water.
C) Aerobic respiration produces carbon dioxide and water as a byproduct.
D) Aerobic respiration is the process that provides usable energy in the form of ATP.
E) Aerobic respiration occurs in the mitochondria of the cells of eukaryotes, including plants and animals.
A) Aerobic respiration requires glucose and oxygen. Oxygen is used in the breakdown of glucose, producing energy in the form of ATP.
What is Aerobic?Aerobic exercise is a type of physical activity that requires the use of large muscle groups and increases the heart rate to a target level. It is also known as cardiovascular exercise because it strengthens the heart and lungs, improving their function.
B) Aerobic respiration produces ATP from glucose and water. During aerobic respiration, glucose and oxygen are broken down to form ATP, water, and carbon dioxide.
C) Aerobic respiration produces carbon dioxide and water as a byproduct. Carbon dioxide and water are produced as a result of the breakdown of glucose and oxygen.
D) Aerobic respiration is the process that provides usable energy in the form of ATP. During aerobic respiration, glucose and oxygen are broken down to form ATP, which is a form of usable energy.
E) Aerobic respiration occurs in the mitochondria of the cells of eukaryotes, including plants and animals. Aerobic respiration takes place in the mitochondria, which are found in the cells of eukaryotes.
To learn more about Aerobic
https://brainly.com/question/11691469
#SPJ1
With respect to ABO and Rh blood groups, there are __________ different blood types.
With respect to ABO and Rh blood groups, there are 8 different blood types. the eight blood types are: A+, A-, B+, B-, AB+, AB-, O+, and O-.
The ABO blood group system is based on the presence or absence of two antigens (A and B) on the surface of red blood cells, as well as the presence or absence of antibodies against these antigens in the plasma. There are four main blood types in the ABO system: type A, type B, type AB, and type O.
The Rh blood group system is based on the presence or absence of another antigen (Rh factor) on the surface of red blood cells. Individuals who have the Rh antigen are considered Rh positive (Rh+), while those who do not are considered Rh negative (Rh-).
Know more about Rh antigen here: https://brainly.com/question/10551753
#SPJ4
Please help me in your own words don’t copy off the internet
1) Anthropogenic activities have caused the amount of carbon in the atmosphere to increase considerably in the past century.
2) By reducing the use of the fossil fuels using alternative energy sources. The human impact on the carbon cycle can be curbed.
How does human beings affect the carbon cycle?Human activities have a significant impact on the carbon cycle, which is the flow of carbon through the Earth's atmosphere, oceans, and land. The carbon cycle plays a crucial role in regulating the Earth's climate, as it helps to balance the levels of carbon dioxide (CO2) and other greenhouse gases in the atmosphere.
Human activities have caused a significant increase in the amount of CO2 in the atmosphere, leading to changes in the carbon cycle
Learn more about carbon cycle:https://brainly.com/question/30633292
#SPJ1
------ are the sites of aerobic respiration in the cell
Answer:
Mitocondria
Explanation:
procedures performed on the female genital system are only laparoscopic procedures.true/false
It is false that procedures performed on the female genital system are only laparoscopic procedures.
Procedures performed on the female genital system are not limited to laparoscopic procedures. While laparoscopy is a common minimally invasive technique used for certain gynecological procedures such as hysterectomy, ovarian cyst removal, and endometriosis treatment, there are many other types of procedures that may be performed on the female genital system.
that may be performed on the female genital system, such as vaginal hysterectomy, abdominal hysterectomy, and oophorectomy, which are not necessarily laparoscopic. The choice of procedure depends on the specific condition being treated, the patient's medical history, and other factors.
Know more about endometriosis here: https://brainly.com/question/30473078
#SPJ4
what is the order of processes that support the central dogma?
The order of processes that support the central dogma states that, DNA carries protein-making instructions, which RNA copies. The instructions are then used by RNA to create a protein.
The core dogma depicts the flow of genetic information in cells, including DNA replication and RNA coding via transcription, and RNA coding for proteins via translation.
It may be described in a very brief and simplistic form as "DNA creates RNA makes proteins, which in turn assist the previous two stages as well as the replication of DNA", or simply "DNA → RNA → protein". As a result, this process is divided into three steps: transcription, translation, and replication.
Transcription is the process of transferring information from a portion of DNA to a newly constructed piece of messenger RNA (mRNA). RNA polymerase and transcription factors aid in this process.
This mature mRNA eventually makes its way to a ribosome, where it is translated. Transcription and translation may be coupled together in prokaryotic cells, which lack a nuclear compartment.
Because the location of transcription (the nucleus) and the site of translation (the cytoplasm) are frequently separated in eukaryotic cells, mRNA must be carried from the nucleus into the cytoplasm, where it may be bound by ribosomes. The ribosome reads mRNA as triplate codons, which normally begin with an AUG, or initiator methonine codon, downstream of the ribosome binding site.
Initiation and elongation factor complexes transport amino acylated transfer RNAs (tRNAs) into the ribosome-mRNA complex, matching the mRNA codon to the anti-codon in the tRNA and therefore adding the right amino acid to the sequence encoding the gene. The amino acids begin folding into the right configuration as they are joined into the expanding peptide chain.
Replication is carried out by a complex group of proteins that unwind the superhelix, unwind the double-stranded DNA helix, and copy or replicate the master template itself using DNA polymerase and its associated proteins so that the cycle can repeat DNA RNA protein in a new generation of cells or organisms.
Learn more about central dogma at https://brainly.com/question/12702705
#SPJ4
what is the overall goal in conducting a bacterial transformation
The overall purpose of a bacterial transformation is to introduce a genetic element into the bacterial cell, such as a DNA plasmid or gene, which will subsequently be duplicated and expressed by the bacterial cell.
This method is extensively utilised in the field of biotechnology since it enables researchers to investigate genetic engineering and produce genetically altered organisms that may be applied to the manufacture of drugs, biofuels, food, and other things.
The production of competent bacterial cells, which are prepared in a way that allows them to absorb the genetic material, usually marks the beginning of the transformation process.
The cells are then given the genetic material, and they are incubated at a temperature that enables the transformation to take place.
Following the completion of the transformation, the cells are cultured again to allow the cells to express the new genetic material.
Complete Question:
What is the overall goal of conducting a bacterial transformation?
To learn more about biotechnology visit:
https://brainly.com/question/979476
#SPJ4
plants and animals go through the process of _______________________ to use stored energy.
plants and animals go through the process of Cellular Respiration to use stored energy.
They employ photosynthesis to convert water, sunshine, and CO2 into oxygen and simple sugars that the plant may use as fuel. Animals must seek or gather food to obtain the energy they require, but plants may produce their own food utilizing light energy from the sun.
This process is known as photosynthesis, and it occurs in chloroplasts, which are microscopic green structures found in the green sections of plants. Plants are autotrophs; they obtain energy from sunlight through the process of photosynthesis, which is carried out by cell organelles known as chloroplasts. Animal cells lack chloroplasts.
Learn more about plants and animals
https://brainly.com/question/329225
#SPJ4
how do i calculate the energy transferred here
The total amount of energy transferred during photosynthesis is found to be 290,000 kcal/[tex]m^2/year.[/tex] Thus, the corrrect option for this question is D.
What is the net primary productivity (NPP)?The net primary productivity (NPP) may be defined as the amount of energy that is available to primary consumers. This energy is available for consumers and increases biomass. It is the amount of matter accumulated by plants per unit area in a given time.
According to the question,
The net primary production of a pine forest = 175,000 kcal/[tex]m^2/year.[/tex]
The amount of plant respiration = 115,000 kcal/[tex]m^2/year.[/tex]
Therefore, the total or gross primary production (GPP) of the pine forest is calculated through the following formula:
GPP = NPP + Respiration loss.= 175,000 + 115,000 = 290,000 kcal/[tex]m^2/year.[/tex]
Therefore, the total amount of energy transferred during photosynthesis is found to be 290,000 kcal/[tex]m^2/year.[/tex] Thus, the corrrect option for this question is D.
To learn more about NPP and GPP, refer to the link:
https://brainly.com/question/29696025
#SPJ1
What is the first stage of meiosis during which a cell is considered haploid?
Answer:
(Prophase II) is the first stage of meiosis during which a cell is considered haploid. A haploid cell will comprise a single copy of each chromosome, whereas diploid cells comprise more than one copy, which is referred to as the homologous pair.
Explanation:
Answer:
prophase I
Explanation:
The first stage of meiosis during which a cell is considered haploid is called prophase I. During prophase I, homologous chromosomes pair up and exchange genetic material in a process called synapsis. The result of this exchange is that each chromosome now consists of a mixture of genetic information from both the maternal and paternal chromosomes, making the cell haploid.
ALLEN
Help, need this for a biology class
Answer:
see...
one of my favourite organism is parrot (bird)...
therefore, name of the organism will be parrot...
parrot gets it's food by hunting with claws and beaks and also consumes leaves from plants, small insects...
it basically likes to eat bengal gram...
it lives in tropical and sub tropical climate...
it lays eggs...
its one of the main defence organ is its beak...
pic is in the above...
hope it helps
which type of cell receives information from the external world and conveys this information to the brain?
Sensory neurons are the type of cell that receives information from the external world and conveys this information to the brain.
Sensory neurons, also called afferent neurons, are specialized cells that transmit sensory information from sensory receptors in the body to the central nervous system, which includes the brain and spinal cord. They are responsible for detecting different types of stimuli, such as light, sound, touch, temperature, and chemicals, and converting them into electrical signals that can be processed by the nervous system. Sensory neurons are found in various parts of the body, including the skin, eyes, ears, nose, and tongue, and brain they play a critical role in our ability to perceive and interact with the environment.
Learn more about brain here:
https://brainly.com/question/30435793
#SPJ4
which molecule did carl woese study to produce his tree of life?
Carl Woese developed his tree of life by studying ribosomal RNA (rRNA) molecules.
Bacteria, Archaea, and Eukaryota were the three different domains that this tree was the first to separate all known lifeforms into. This tree of life was groundbreaking because it revealed the limitations of the conventional two-kingdom categorization system, which divided all living creatures into either plants or animals.
The basis for this new categorization scheme was Woese's work with rRNA molecules. All living cells contain rRNA molecules, which may be used to assess how different and similar different species are.
This approach was used by Woese to identify the relationships between species and their positions in the evolutionary tree.
By analysing the sequence of bases in rRNA molecules from various species, he was able to estimate the degree of relatedness between them and so classify them into three separate domains.
To learn more about RNA visit:
https://brainly.com/question/1978304
#SPJ4
how many large peaks (ie not including stutter bands) do you expect to see if your sample is 1) homozygote 2) heterozygote at a locus?
The right answer is B; homozygotes must have two peaks, while homozygotes must have one peak.
Homozygote and heterozygote: what are they?Allele pairings are categorised using the terms homozygous and heterozygous. People who are homozygous have 2 copies of the identical genotype (RR or rr). In contrast, heterozygous speaks to a creature containing a variety of alleles (Rr).
What are genotype and homozygous?Pay attention to how it sounds. (HOH-moh-ZY-gus JEE-noh-tipe) a phrase that refers to having two copies of the same gene that are exactly the same (one inherited from the mother and one inherited from the father). When two genes are homozygous for a certain mutation, either one or both are normally functioning (change).
To know more about Homozygote visit :
https://brainly.com/question/29455764
#SPJ4
The Complete Question :
How many large peaks (ie not including stutter bands) do you expect to see if your sample is a 1) homozygote or 2) heterozygote at a locus?
OA. Both should have a single peak
OB. Homozygotes should have one peak, while heterozygotes should have two
OC. Homozygotes should have two peaks, while heterozygotes should have one
OD. Both should have two peaks
OE. Both could have one or two peaks, and it is impossible to know for a given sample
Muscles are not likely to tear from their bones because? Select one: a. the tendons are partially ossified at their attachment points to the periosteum. b. a circumferential lamella sandwiches the ends of the tendon onto the surface of an adjacent lamella. c. perforating fibers of collagen attach the tendons and periosteum to the cortical surfaces of bone. d. elastin fibers in the tendon can allow for stretching and recoil of the muscle.
Because collagen perforating fibers connect the tendons and periosteum to the cortical surfaces of bone, it is unlikely that muscles will separate from their bones. C is the correct option .
Sharpey's fibres, which extend to the outer circumferential and interstitial lamellae of bone, are strong collagenous fibers that bind the periosteum to the bone. An outside "fibrous layer" and an inner "cambium layer" make up the periosteum.
The cambium layer contains progenitor cells that eventually become osteoblasts, which widen the bone, whereas the fibrous layer contains fibroblasts. The progenitor cells that form osteoblasts and chondroblasts after a bone fracture are crucial to the healing process. It has nociceptive nerve endings, which makes it more sensitive to manipulation than bone itself does.
To learn more about tendons and periosteum click here:
brainly.com/question/29101377
#SPJ4
herbivory on brassica plants can induce the production of defensive chemicals such as glucosinolates. for example, one of the effects of these chemicals is to inhibit the growth of plant-eating caterpillars. What are other ways to be able to provide defense for plants so that they are not eaten by pests?
Plants have evolved various mechanisms to defend themselves against herbivores and other pests. Here are some examples:
Physical defenses: Plants can have physical structures that make it difficult for herbivores to eat them, such as spines, thorns, and tough or hairy leaves. Some plants also have tough bark that protects them from damage by larger animals.Chemical defenses: Plants can produce a variety of chemicals that are toxic or unpleasant to herbivores. Some plants produce alkaloids, terpenoids, or phenolic compounds that are toxic to herbivores, while others produce compounds that make them taste bad or smell unpleasant.Induced defenses: Plants can produce defensive chemicals in response to herbivory or other stressors, such as damage from pathogens or extreme temperatures. For example, jasmonic acid is a signaling molecule that triggers the production of defensive compounds in many plant species.Mimicry: Some plants mimic the appearance or chemical profile of other organisms to deter herbivores. For example, some orchids produce flowers that resemble female wasps, which discourage male wasps from landing on the flowers and potentially damaging them.Mutualistic relationships: Some plants have evolved mutualistic relationships with other organisms, such as ants or parasitic wasps, that help to defend them against herbivores. In exchange, the plant provides food or shelter for the other organism.These are just a few examples of the many ways that plants can defend themselves against herbivores and other pests. Plant defense strategies can be highly diverse and complex, and often involve multiple mechanisms working together to provide protection.
To learn more about Plants refer to this link
https://brainly.com/question/13052059
#SPJ4
which area of the brain is most likely damaged if a patient experiences trouble speaking and planning ahead?
A lesion on the frontal lobes may impair a person's capacity to regulate emotions, impulses, and actions. It may also make it difficult for them to remember events or speak clearly in brains.
What area of the brain controls speech and planning?The brain stem regulates the body's survival-dependent automatic processes, including breathing and heart rate : anterior lobes. The frontal lobes, the largest of the four lobes, have a variety of roles in the body.
These include linguistic, cognitive, behavioral, and motor skills like voluntary movement. According to recent studies, the frontal brain region known as Broca's area, which is depicted above in color, prepares the speaking process by interacting with the temporal cortex, which processes sensory data, and the motor cortex, which regulates movement.
To learn more about brain Visit: brainly.com/question/1247675
#SPJ4
Correct Question:
What area of the brain is most likely damaged if a patient experiences trouble speaking and planning ahead?
microorganisms require phosphorus, sulfur, iron, and magnesium for metabolism. what specifically are these elements used for in microbial metabolism or cellular structures?
These components are utilised in cellular or microbiological metabolism as ultimate e- acceptors.
Weight gain and decrease are strongly influenced by metabolism. Weight loss happens when the body expends more energy than it consumes through meals. This is due to the fact that the body must utilize fat-stored energy in order to up again for calorie deficit.
Numerous variables, such as heredity, ageing, body mass, and hormonal balance, have an impact on metabolism. Resting metabolic rate (BMR), or the quantity of calories burned while at rest, is influenced by genes.
To know more about Metabolism visit :
brainly.com/question/29763323
#SPJ4
which endocrine gland produces adrenaline and cortisol?
The adrenal gland is an endocrine organ that produces cortisol and adrenaline.
The adrenal cortex and the adrenal medulla are the two separate components that make up the adrenal gland. While the adrenal medulla generates hormones like adrenaline and noradrenaline, the adrenal cortex is in charge of creating hormones like cortisol and aldosterone.
Both the hormones cortisol and adrenaline are secreted in reaction to stress and have a variety of physiological consequences, including raising blood pressure, heart rate, and energy levels.
They aid in maintaining homeostasis by controlling how the body reacts to various forms of stress.
Additionally, cortisol is crucial for the body's metabolism and aids in immune system regulation.
To learn more about endocrine visit:
https://brainly.com/question/4455660
#SPJ4
What layer of the epidermis contains pre-keratin?
The layer of the epidermis that contains pre-keratin is the stratum spinosum, which is located above the basal cell layer and below the stratum granulosum.
The cells in the stratum spinosum are called spiny cells, because they appear to have little spines on their surface when viewed under a microscope. These spines are actually desmosomes, which are specialized cell junctions that help to hold the cells together.
The spiny cells in the stratum spinosum contain pre-keratin filaments, which are intermediate filaments that provide structural support to the cell. These pre-keratin filaments will eventually develop into fully mature keratin fibers as the cells move up into the next layer of the epidermis, the stratum granulosum.
The process of keratinization, or the conversion of pre-keratin into keratin, is a key step in the formation of the tough, waterproof barrier that protects the body from the external environment.
To know more about epidermis here
https://brainly.com/question/13450121
#SPJ4
How does the immune system respond to food allergies?
Mostly food allergies affect the immune system. Even small amounts of the offending food can cause a variety of symptoms, some of which may be severe or even life-threatening.
A person who is sensitive to a substance, such as dust, mould, or pollen, may overreact by producing antibodies that "attack" the allergen when they come into touch with that substance. The can cause symptoms such as wheezing, itching, runny nose, watery or itchy eyes, and therefore, we cannot eat food which is not suitable for our health.
Contrarily, a food intolerance often only affects the digestive system and has milder reaction.Moreover, as we know that health is wealth so we must always stay alert with what we are eating.
To know more about allergies lease check the following link
https://brainly.com/question/4562398
#SPJ4
At least 2-3 sentences explaining how the outrageous offspring is a model proving sexual reproduction causes genetic variation in offspring
What causes the impairment of voluntary muscle movement?
An issue with the nerves that transmit messages from your brain to your muscles and cause them to contract consistently is what causes loss of muscle function. Skeletal muscles that you can fully control are referred to as voluntary muscles.
Muscular function loss may be partial or total. Partial loss of muscle function, which only affects a region of your body, is the main symptom of a stroke.
Complete muscle paralysis affects your entire body. It frequently affects those who have suffered severe spinal cord injuries.
A loss of muscle function that affects both the top and bottom sides of your body is referred to medically as quadriplegia. When a condition just affects the bottom half of your body, it is referred to as paraplegia. Loss of muscle function is caused by a problem with the nerves that carry signals from your brain to your muscles and cause them to contract regularly. While you're healthy, you have control over your voluntary muscles' ability to move. Voluntary muscles are skeletal muscles that are entirely under your control.
Examples of involuntary muscles that are not under your conscious control include your heart and the smooth muscles in your intestines. Nonetheless, they have a chance of failing as well. Loss of function of involuntary muscles can be fatal.
To learn more about muscles please click on the given link: https://brainly.com/question/14294390
#SPJ4
bone can appear in different colors due to group of answer choices sun bleaching coffin staining burning all of the above none of the above
Bone can appear in different colors due to all of the above: sun, bleaching, coffin staining, and burning. Thus, option E is correct.
Postmortem skeletal deterioration can be dependent on the factors like soil pH, moisture, temperature, and micro-organisms present in the air. The color changes in the bone are a result of this skeletal deterioration. When the un-fossilized bones are exposed to rain and sun, its surface starts deteriorating, the organic content as well is lost. This is referred to as weathering of bones.
Burning of bones produces a purple color in the bones. Identification of numerous postmortem alterations and the reconstruction of the depositional history of the remains are both parts of forensic skeletal analysis. In order to reconstruct the post-depositional environment of skeletal remains, it is crucial to describe any color changes connected with bones.
To know more about post-mortem analysis, refer:
https://brainly.com/question/28201324
#SPJ4
which structure of the eye is the most sensitive but contains no blood vessels? retina | pupil | cornea | transparant capsule
cornea is the structure of the eye is the most sensitive but contains no blood vessels.
The main role of cornea includes to refract, or we say to bend light and also cornea helps in provides approximately 65 to 75 percent of the focusing power of the eye
The composition of cornea includes protein and cells and it is the clear outer layer at the front of the eye and covers pupil, iris and other parts.
as cornea is thin, various allergies, scratching or we say deeper scratches or injuries can cause corneal scarring and vision problems
cornea has 5 layers like,
The corneal epithelium, Bowman's layer, The corneal stroma, Descemet's membrane, The corneal endothelium
To know more about cornea,
https://brainly.com/question/29366850
#SPJ4
select the statement that correctly describes the roles of histone and nonhistone proteins found in chromatin?
DNA is wound around histone proteins in order to regulate gene expression. Each nucleosome is made up of eight histone proteins called histone octamers that are shaped like spools and wrap around DNA.
Chromatin each cell's nucleus is crammed full of tightly packed DNA. As seen in the video, DNA binds to histone proteins to form nucleosomes, which are little loops of DNA.
DNA forms nucleosomes, often known as the "beads on a string configuration," by wrapping around histone proteins (euchromatin). A 30-nanometer fiber made of nucleosome arrays in their smallest configuration is wrapped in multiple histones (heterochromatin).
One of the primary causes of histone protein methylation, demethylation, and acylation, which start the transcriptional process, is epigenetic changes. All of the aforementioned modifications result in a shift in the proportion of lysine to arginine residues, which is the primary factor affecting chromatin structure as needed.
Learn more about histone proteins here
https://brainly.com/question/29772186
#SPJ4
The Complete question is
select the statement that correctly describes the roles of histone and nonhistone proteins found in chromatin?
A. combination of amino acid modifications in the histone tails.
B. coding sequences in the messenger RNAs for histone proteins.
C. combination of histone proteins found within the nucleosome.
D. proportion of arginine and lysine amino acids in the histone proteins.
Researchers control factors that might influence a dependent variable by means of:a.random assignmentb.replicationc.naturalistic observationd.operational definitions42.
The correct option is A. By using random assignment, researchers are able to control variables (such age and attitudes) that may have an impact on a dependent variable.
There are often two different sorts of variables in analytical health research. We anticipate that independent variables will have an impact on dependent variables. What occurs as a result of the independent variable is referred to as a dependent variable. The cause is the independent variable. Its value is unaffected by the other study variables. Effect is the dependent variable. Changes in the independent variable affect its value. For instance, vehicle exhaust would be the independent variable and asthma would be the dependent variable if we wanted to investigate if high quantities of vehicle exhaust have an impact on the occurrence of asthma in children.
learn more about dependent variable here:
https://brainly.com/question/1479694
#SPJ4
