At 100x magnification, the student is likely to see either prokaryotic or small eukaryotic cells.
What cell structures can be seen at 100x magnification?At this magnification, she may be able to see individual cell structures, such as the cell membrane or cytoplasm, but details such as organelles will likely not be visible.
The amount of detail that can be seen depends on the quality of the microscope and the sample being viewed.
Hence, it can be seen that prokaryotic or small eukaryotic cells can be seen when magnified 100x as they are really small and cannot be seen by the human eye.
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calculate the probability of sex-linked phenotypes of multiple offspring using binomial expansion queen victoria had 2 out of 5 carrier daughters. what was the probability of this scenario?
Queen Victoria's carrier status for a sex-linked trait can be determined by using the binomial expansion formula. The probability is 62.5%
The formula to calculate the probability of a specific outcome "k" in "n" independent trials is given by:
P(k) = (n choose k) * p^k * (1-p)^(n-k)
where p is the probability of a successful outcome (i.e., carrier daughter) in each trial, and (n choose k) is the number of combinations of "n" items taken "k" at a time, which can be calculated using the formula:
(n choose k) = n! / (k! * (n-k)!)
In this case, n = 5 (number of offspring), k = 2 (number of carrier daughters), and p = 0.5 (probability of a daughter being a carrier if the father is a carrier, since this is a sex-linked trait). Substituting the values in the formula, we get:
P(2) = (5 choose 2) * 0.5^2 * (1-0.5)^(5-2)
P(2) = (10/2) * 0.25 * 0.25
P(2) = 10 * 0.0625
P(2) = 0.625 or 62.5%
So, the probability of Queen Victoria having 2 out of 5 carrier daughters is 62.5%.
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the grants had three questions they were trying to answer by studying the finches. what were two of them?
Two of the questions that the Grants were trying to answer were:
How does natural selection affect the beak size and shape of finches over time?How does the variation in beak size and shape affect the finches' ability to survive and reproduce?The Grants had three questions they were trying to answer through their study of the finches. This study, conducted by Peter and Rosemary Grant, was a long-term research project that focused on the evolution of beak size and shape in the finches of the Galápagos Islands.
The Grants studied the finches over many years and observed changes in the beak size and shape in response to changes in their environment, such as variations in food availability.
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understand how a neuron interacts with a skeletal muscle fiber to cause a contraction; know the importance of the neuromuscular junction
A chemical message is released by the motor neuron when the nervous system signal reaches the neuromuscular junction.
Acetylcholine, a neurotransmitter, connects to receptors on the exterior of the muscle fibre to deliver the chemical message. A skeletal muscle fibre contracts in response to a motor neuron signal as the thin filaments are tugged and then slide through the thick filaments inside the fiber's sarcomeres. This method of muscular contraction is referred to as the sliding filament model. There is a muscle fibre right next to every motor neuron ending. A neuromuscular junction is the location where they connect. A substance is released by the motor neurons, and the muscle fibre absorbs it.
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Help!! Need by tonight!!
3. Suggest a new question to explore in a future experiment for part 1. (5 points)
Hint: What is another variable related to the process of cellular respiration, other than the amount of sugar available, that you could test? Think about the formula for cellular respiration, and be sure to base your question on a variable that would affect the reaction
ATP molecules are produced during fermentation, exactly like they are during aerobic cellular respiration. The type of sugar utilized to produce ATP was the experiment's independent variable. Glucose is the preferred fuel, according to the experiment's findings.
What is the typical rate of breathing?The rates of respiration may increase with fever and other medical disorders. Consideration should also be given to any breathing problems a person may have. Adults normally breathe between 12 and 16 times per minute while they are at rest.
What breathing technique does that involve?In order to produce energy and carbon dioxide, food and glucose are oxidized in the cells as part of the respiration process. This process results in the breakdown of large molecules like glucose into smaller ones like water and carbon dioxide.
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Need help 15 points
The main function of petals is to attract pollinators. The corolla is the collective name for a flower's petals.
What is petals?Flowers' reproductive organs are encircled by petals, which are modified leaves. To draw pollinators, they are frequently brightly colored or shaped differently.
The corolla is the collective name for a flower's petals. Typically, petals are joined by a second group of altered leaves called sepals, which together make up the calyx and are located directly below the corolla. The main function of petals is to attract pollinators.
Therefore, the main function of petals is to attract pollinators.
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What is the purpose of wiping down your work area with bleach before and after an experiment?
List five safety precautions you used to protect yourself while culturing microbes.
What is a colony and how does a colony relate to a bacterial cell? Why are colonies important in the study of microbiology?
To sanitise the work environment, bleach should be applied both before and after an experiment. An essential technique used in the microbiology lab to identify bacteria is colony morphology observation.
Safety precautions:
Make sure you are taking all required procedures to avoid introducing undesirable germs to your culture before beginning an experiment.To avoid breaking the glass, caution should be taken when opening tubes with tight caps. When handling culture media or any reagent, stain, fixative, or chemical used in a laboratory, caution should be taken to prevent contact with the skin, eyes, or mucous membranes.Colony & importance:
According to the definition of a colony, which is an apparent collection of microorganisms that have all descended from a single mother cell, a colony is a collection of genetically identical bacteria.To examine the distinctive form, size, colour, surface texture, and isolation from other colonies, colonies must be kept widely apart.Learn more about microbes here:
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if the interference value for the double-crossover progeny from a three-point testcross is 0.3, what does that mean?
If the interference value for the double-crossover progeny from a three-point testcross is 0.3, it means that 70% of the expected double-crossover progeny will be observed.
What is double crossover progeny?А double crossover occurs when frаgments of the chromosome аre exchаnged in two plаces. The result of а double crossover is thаt the two ends of the chromosome аre pаrentаl, but а region between the crossovers hаs been "swаpped" for аnother sister chromаtid sequence.
An interference value of 0.3 means that 30% of the double crossover progeny expected will not be observed. Thus, it also means that 70% of the expected double-crossover progeny will be observed.
Your question is incomplete, but most probably your full option was
a. that 30% of the expected double-crossover progeny will be observed
b. that 70% of the expected double-crossover progeny will be observed
c. that 70% of the expected double-crossover progeny will not be observed
Thus, the correct option is B.
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a structure that is composed of two or more tissue types that work together to perform specific functions for the body is a(n)
A structure that is composed of two or more tissue types that work together to perform specific functions for the body is an organ.
In biology, an organ is a group of tissues that have been adapted to perform a specific function in an organism. The more advanced the organism is, the more amount of organs exist in its body.
An advanced organism usually has its organs grouped into organ systems. For example, a human has AT LEAST six organ systems: respiratory, reproductive, circulatory, excretory, digestive, and nervous.
Attached below is an image that shows some of the internal organs that human has.
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How to find the actual size of a nucleus with a plant cell measuring2mmm
Answer: You have to divide the number of cells that cross the diameter of the field of view into the diameter of the field of view.
Explanation:
What is a key difference between a local (paracrine) regulator and a hormone?
a) Local regulators are small, hydrophobic molecules; hormones are either large polypeptides or steroids.
b) Local regulators diffuse to neighbouring cells; hormones usually travel throughout the body to distant target cells.
c) Local regulators initiate short-term responses; hormones trigger longer-lasting responses.
d) The signal transduction pathways of local regulators do not involve second messengers; pathways triggered by hormones do involve second messengers.
e) Local regulators often open ligand-gated channels and affect ion concentrations in cells; hormones bind with intracellular receptors and affect gene expression.
The key difference between a local (paracrine) regulator and a hormone is b) Local regulators diffuse to neighbouring cells; hormones usually travel throughout the body to distant target cells.
This is the most accurate distinction between the two types of regulators. Local regulators diffuse to neighboring cells and have a more limited range of target cells, while hormones are secreted into the bloodstream and can travel throughout the body to reach distant target cells.
So, the correct option is (b) Local regulators diffuse to neighbouring cells; hormones usually travel throughout the body to distant target cells.
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How did the lab activities help you answer the lesson question: How do environmental changes affect both living and nonliving things in a watershed? What conclusions can you make based on your observations?
The lab activities contribute to the answer by allowing hands-on observation and experimentation in the environment, which affects both living and nonliving things of the watershed.
What is the significance of the lab activities?Lab activities are very useful as they provide the individual with the skill of experimentation, the way to prove the hypothesis or theory, help students learn and apply the scientific method, and also improve problem-solving, critical thinking, data analysis, etc. to solve real-world problems and situations.
Hence, the lab activities contribute to the answer by allowing hands-on observation and experimentation in the environment, which affects both living and nonliving things.
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Answer:
In the lab activity, I used a virtual watershed to demonstrate how pollutants enter and flow through the watershed. I constructed food chains to show how biotic factors are related. I also predicted and modeled how human activity affected the biotic factors in an ecosystem. Based on my observations, I can conclude that biotic and abiotic factors are closely linked and that human activity that changes the environment, like pollution, can affect all the other parts of an ecosystem in a negative way.
who discovered the abo system and who regulates blood bank facilities today ?
The ABO blood group system was discovered by Austrian biologist Karl Landsteiner in 1901.
The ABO blood group system is a classification of blood based on the presence or absence of certain antigens on red blood cells. It was discovered by Karl Landsteiner, an Austrian biologist, in 1901. This discovery revolutionized the field of transfusion medicine, allowing for safer blood transfusions and helping to save countless lives. Today, blood bank facilities are regulated by government agencies, such as the US Food and Drug Administration (FDA), to ensure that they meet standards for safety, quality, and effectiveness. These agencies also oversee the collection, processing, storage, and distribution of blood and blood products to ensure that they are safe for patients and meet the needs of healthcare providers.
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All of the following laboratory tests are used to determine kidney function EXCEPT: A. Creatinine B. Blood urea nitrogen (BUN) C. Amylase D. Phosphorus
The laboratory test used to determine kidney function that is not listed among the options is C. Amylase.
Amylase is an enzyme that is produced and released by the pancreas, not the kidneys. It is commonly measured in the blood to diagnose conditions related to the pancreas, such as pancreatitis, but it is not typically used to assess kidney function.
Creatinine is a waste product produced by muscle metabolism that is normally filtered by the kidneys and excreted in the urine.
BUN is a waste product of protein metabolism that is also filtered by the kidneys.
Phosphorus is a mineral that is regulated by the kidneys, and elevated levels in the blood can indicate kidney disease.
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arrows are pointing to a connective tissue layer that is stained blue. name the layer that is a component of the tissue in this field?
This seems to be Mason's Trichrome staining that is used to study the connective tissue fibers in a section of tissue. In this method, college fibers (as depicted by arrows in given image) are stained blue.
Moreover, nuclei is stained in blue-black hue. Other components like keratin, cytoplasm, muscle fibers etc., paper in pink/red hue Connective tissue includes 3 foremost components: cells, protein fibers, and an amorphous floor substance. Together the fibers and floor substance make up the extracellular matrix. Tissue that supports, protects, and offers shape to different tissues and organs withinside the body. Connective tissue additionally shops fat, facilitates circulate vitamins and different materials among tissues and organs, and facilitates restore broken tissue. Connective tissue is made of cells, fibers, and a gel-like substance. Unlike epithelial tissue, which consists of cells carefully filled with very little extracellular area in among, connective tissue cells are dispersed in a matrix.
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Which cell structure acts as a selectively permeable barrier, controlling the movement of substances into and out of the cell?
The cell membrane functions as a selectively permeable barrier, regulating how things enter and leave the cell.
A cell is protected by its cell membrane, also known as the plasma membrane.
The membrane also keeps a uniform atmosphere from the inside of the cell, and it has a variety of responsibilities.
One is to move compounds out of the cell that are harmful as well as nutrients into the cell.
Another is that there will be proteins on the cell's membrane, which is its plasma membrane, that interact with other cells.
These proteins may be lipid proteins, which contain both a protein and a fatty acid, or they may be glycoproteins, which contain both a protein and a sugar moiety.
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the rate at which dna migrates through the gel is determined by:
Answer:
1. surface area
2. concentration
3.distance
Explanation:
more surface area means a faster rate, and smaller distance means faster rate
The molecular weight of the DNA determines how quickly it migrates through the gel.
What is DNA?
A polymer made of two polynucleotide chains that coil around one another to form a double helix is called deoxyribonucleic acid. All known organisms and many viruses have genetic information in the polymer that is necessary for their development, operation, growth, and reproduction. Nucleic acids include DNA and ribonucleic acid (RNA). Nucleic acids are one of the four main categories of macromolecules that are necessary for all known forms of life, along with proteins, lipids, and complex carbohydrates (polysaccharides). Because the two DNA strands are made up of simpler monomeric units termed nucleotides, they are referred to as polynucleotides.
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What happens at an occluded front?
As the cool air masses collide in the centre, the warm air mass rises. As the temperature decreases, the warm air mass is "cut off" or occluded from the earth and forced upward.
What sorts of weather can occlude a front?An occluded front can encounter a variety of weather, involving strong thunderstorms and tornadoes, but very often, their passage is linked to the drying of the air mass. Additionally, when there is sufficient wind shear along the cold front, cold core funnel clouds may form.
Do thunderstorms develop along occluded fronts?Thunderstorms that may be a part of a quicker moving squall line along and ahead of a cold or obscured front are generally brought on by these systems. North of a warm front, thunderstorms may potentially be incorporated into widespread precipitation. Furthermore, they can develop as the upper level low passes over your route in the unstable air behind the front.
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The father of baby Elmer is
The father of baby Elmer is Evan.
Who is Baby Elmer?Elmer is the arch-nemesis of Bugs Bunny in the Bugs Bunny cartoons and was the most recurring enemy of Bugs. Elmer was willing to try and kill Bugs Bunny and Daffy Duck, and his actions often lead Bugs to trick him in many way.
He speaks in an unusual way, replacing his Rs and Ls with Ws, so he often refers to Bugs Bunny as a "scwewy" or "wascawwy (rascally) wabbit". Elmer's signature catchphrase is, "Shhh.
When a youngster is learning to speak, he or she will often have difficulty producing certain sounds and will replace those sounds with another sound. A common example of this is the “Elmer Fudd” way of speaking, where all the /r/ sounds are replaced by /w/ sounds.
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Indicate which form of hemopoiesis can improve the symptoms of each condition.Improved through erythropoesis:Sickle cell diseaseAnemiaHemolysisHypoxiaHemolytic disease of the newbornMalariaKwashiorkorHemorrhageTransfusion reactionsImproved through leukopoesis:LeukopeniaNOT improved through erythropoesis or leukopoesis:LeukemiaHematologyPrimary polycythemiaSecondary polycythemia
Currently, the only treatment available for some sickle cell disease patients is a bone marrow and blood transplant.
Your healthcare practitioner could provide medications or transfusions after an early diagnosis to treat problems, such as chronic discomfort. Eat well-balanced meals and drink glasses of water each day if you have sickle cell disease. Avoid becoming too hot, chilly, or exhausted. Children should engage in physical activity to maintain their health. The gene that instructs the body to produce hemoglobin, an iron-rich substance found in red blood cells, is altered in sickle cell anemia. Red blood cells deliver oxygen from the lungs throughout the body thanks to hemoglobin.
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which of the following best describes the component that metformin represents in a signal transduction pathway that regulates glucose production in the liver? responses it is a secondary messenger that amplifies a signal through a cascade reaction. it is a secondary messenger that amplifies a signal through a cascade reaction. it is a ligand that activates the signal transduction pathway of the activation of ampk . it is a ligand that activates the signal transduction pathway of the activation of a m p k . it is an allosteric regulator that binds to a crucial section of the dna that makes the enzymes needed for glucose uptake. it is an allosteric regulator that binds to a crucial section of the d n a that makes the enzymes needed for glucose uptake. it is a competitive inhibitor that binds to glucose and prevents it from entering the cell.
Metformin is basically a ligand which activates the signal transduction pathway of the activation of AMPK.
Metformin which is sold under the brand name Glucophage is a medication for the treatment of type 2 diabetes which is particularly used by people who are overweight.
AMPK or the 5'-adenosine monophosphate-activated protein kinase signaling pathway is basically a fuel sensor as well as regulator. It functions to promote ATP-producing and inhibit ATP-consuming pathways in different tissues. This pathway is basically a target pathway in order to control diabetes. Metformin when taken acts as a ligand which activates the signal transduction pathway of the activation of AMPK.
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a woman is a carrier for a sex-linked lethal gene that causes spontaneous abortions. she has nine children. how many of these children do you epect to be boys
Qualities that are found in excess of 50 guide units separated act as though they are not connected at all in light of the fact that every chromosome just has 50 units on it.
In the event that the qualities are near one another on the chromosome, the recombination recurrence is tiny. In the event that the qualities are far separated on a chromosome, or on various chromosomes, the recombination recurrence in half. For this situation, the legacy of alleles at the two loci is autonomous.
There are five fundamental methods of legacy for single-quality sicknesses: autosomal predominant, autosomal passive, X-connected prevailing, X-connected latent, and mitochondrial.
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Why do you think reduced-impact logging techniques are used in an FSC certified forest?
Answer: Reduced-impact logging techniques are used in an FSC certified forest because they are designed to minimize the environmental impact of logging while still allowing for the sustainable harvest of timber. These techniques include things like selective logging, which involves only cutting down certain trees rather than clear-cutting an entire area, and using specialized equipment that causes less damage to the soil and surrounding vegetation. By using these methods, the forest is able to recover more quickly after logging, and maintain its biodiversity and ecological integrity. Additionally, FSC (Forest Stewardship Council) certification is a global standard for responsible forestry, which means that the forest is managed in an environmentally appropriate, socially beneficial, and economically viable manner, and that the forest is sustainably managed, while promoting conservation of biodiversity and ecosystems, and respecting the rights of the local communities and indigenous people who depend on the forest.
Explanation:
PLS HELP DUE IN 4MIN is it possible to find Permian rocks beneath devonian rocks
Please help me 50 20 points
According to recent research, the appendix is a repository of beneficial gut bacteria that can repopulate the gut after an illness that flushes out the bacteria, such as diarrhea. This new understanding of the appendix suggests that it is not a completely vestigial structure and may serve a different purpose than its ancestral function.
consider the steps involved in an experiment that uses the scientific method. arrange the six given steps in the order in which they occur. one of the steps will not be used.
Scientific methods are used by scientists in order to perform experiments and prove or disprove their hypothesis. These scientific methods are done in an orderly manner.
The first step in a scientific method is constructing a hypothesis that might be able to explain the observations about the natural phenomenon. After we have observed a natural phenomenon, we then develop a question based on the observations that we made.
The next step is conducting experiments and collecting the resultant data. After we have collected the relevant data, we have to analyze the data that we have. After this step, we will choose the data which is instrumental in supporting our hypothesis and we will ignore the rest of it. Finally, we will share the results and the conclusions of the experiment.
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how could you test this idea that light is not needed for carbon fixation
One way to test this idea that light isn't demanded for carbon fixation is to conduct a series of trials in a laboratory setting.
That would be involve two sets of shops, one set growing in the presence of light and the other in the absence of light. Both sets of shops would be exposed to the same quantum of carbon dioxide, and the rate of carbon obsession in both sets of shops would be recorded.
However, also this would indicate that light isn't necessary for carbon obsession, If the results show that the shops growing in the absence of light fix the same quantum of carbon as the shops growing in the presence of light. This trial could be repeated multiple times to insure the results are dependable.
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which target organ receives dual innervation? which target organ receives dual innervation? sweat glands coronary blood vessels kidney small intestine
The small intestine is the target organ that receives dual innervation. Dual innervation is the innervation given by both thoughtful and parasympathetic sensory systems.
The sympathetic and parasympathetic nervous systems both innervate the majority of visceral organs and parts of the gastrointestinal tract, like the small intestine. The spinal cord provides innervation to the small intestine.
Only the sympathetic nervous system supplies the innervation to the kidney. The afferent and efferent nerves are the nerves that supply kidney function.
The sympathetic or parasympathetic nervous systems innervate some of the effector organs, such as the sweat glands and coronary blood vessels. The parasympathetic cholinergic fibers innervate coronary blood vessels, while the sympathetic cholinergic fibers innervate sweat glands.
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the community of bacteria in the human body provides benefits except?A. Development of immune systemB. Maintenance of gutC. Increase in antibiotic resistance
The community of the bacteria in the human body provides the benefits except increase in the antibiotic resistance ,so the correct option is C.
The community of bacteria in the human body provides numerous benefits, similar as abetting in digestion, abetting in the development of the vulnerable system, and also maintaining a healthy balance of the bacteria in the gut. still, one benefit that it doesn't give is an increase is antibiotic resistance the Bacterial communities are vary in their species composition ,shape, and also niches occupied, and also influence on the different environments also they fascinating examples of the interactive processes that differ with the ecological scale..
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what are the individual ion contributions to the resting membrane potential (rmp) of the sa nodal cells? check all that apply.
Similar to neurons, the resting membrane potential (RMP) of cardiac sinoatrial (pacemaker) nodal cells is -70 mV.
These calcium ions attach to and activate additional calcium channels on the sarcoplasmic reticulum of the cell, known as ryanodine receptors, allowing calcium to exit the SR. The contraction of the heart is brought on by these calcium ions.
The plasma membrane's low permeability to sodium and potassium and increased permeability to calcium determine the resting membrane potential of cardiac muscle cells. The sodium-potassium pump and the sodium and potassium leak channels are the two types of ion channels that keep resting membrane potentials stable. First off, the concentration of potassium ions inside the cell is higher than it is outside.
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Correct Question:
what are the individual ion contributions to the resting membrane potential (rmp) of the sa nodal cells?
which of the following are functions of tfiih? (select all that apply.) it catalyzes rna synthesis from the 5' end to the 3' of the rna. it is a general transcription factor involved in transcription initiation. it phosphorylates the c-terminal domain of rna polymerase. it is responsible for targeting rna polymerase ii to its promoter.
Option B and D that it is a general transcription factor involved in transcription initiation and it is responsible for targeting RNA polymerase ii to its promoter, are the functions of TEIIH.
RNA Pol II is attracted to the promoters of genes by the universal transcription factor TFIIH. It unwinds DNA by acting as a helicase. Additionally, it unravels DNA once a DNA damage has been detected by the transcription-coupled repair (TCR) route of NER or the global genome repair (GGR) pathway. TFIIH also takes part in transcriptional regulation and is essential for lesion confirmation, recruitment of other repair factors, and nucleotide excision repair (NER), which opens DNA at damaged spots. Hence, option B and D are the relevant responses.
A multiprotein complex called transcription factor IIH (TFIIH) is involved in both eukaryotic transcription and DNA repair, demonstrating the close relationship between these two processes. Despite having ten subunits, it can be broken down into a core complex of seven with the XPB translocase, XPD helicase, and the CAK 3-subunit kinase complex.
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