Answer:
Explanation:
Suppose that you have a very precious piece of information. Let’s imagine that this piece of information is a blueprint. In fact, it’s not just a blueprint for a house, or a car, or even a top-secret fighter jet. It’s a blueprint for an entire organism – you – and it not only specifies how to put you together, but also provides the information that enables every cell in your body to keep functioning from moment to moment.
Sounds important, right? You’d probably want to keep information this valuable in a secure spot, perhaps in a protected vault where you can keep an eye on it. In fact, that’s exactly what eukaryotic cells do with their genetic material, placing it in a membrane-enclosed repository called the nucleus.
Eukaryotic DNA never leaves the nucleus; instead, it’s transcribed (copied) into RNA molecules, which may then travel out of the nucleus. In the cytosol, some RNAs associate with structures called ribosomes, where they direct synthesis of proteins. (Other RNAs play functional roles in the cell, serving as structural components of the ribosome or regulating activity of genes.) Here, we’ll look in a little more detail at the structure of the nucleus and ribosomes.
[Do all cells have just one nucleus?]
The nucleus
The nucleus (plural, nuclei) houses the cell’s genetic material, or DNA, and is also the site of synthesis for ribosomes, the cellular machines that assemble proteins. Inside the nucleus, chromatin (DNA wrapped around proteins, described further below) is stored in a gel-like substance called nucleoplasm.
Enclosing the nucleoplasm is the nuclear envelope, which is made up of two layers of membrane: an outer membrane and an inner membrane. Each of these membranes contains two layers of phospholipids, arranged with their tails pointing inward (forming a phospholipid bilayer). There’s a thin space between the two layers of the nuclear envelope, and this space is directly connected to the interior of another membranous organelle, the endoplasmic reticulum.
Nuclear pores, small channels that span the nuclear envelope, let substances enter and exit the nucleus. Each pore is lined by a set of proteins, called the nuclear pore complex, that control what molecules can go in or out.
If you look at a microscope image of the nucleus, you may notice – depending on the type of stain used to visualize the cell – that there’s a dark spot inside it. This darkly staining region is called the nucleolus, and it’s the site in which new ribosomes are assembled.
Active transport is the movement of materials across a membrane that does not
require energy from the cell.
True
False
I need help there just tadpoles
Answer:
Gills
Explanation:
Answer: The answer is gills!
Which is moved across a cell membrane through the process of facilitated diffusion?
PLEASE HELP WILL REWARD
A. Sodium
B. Glucose
C. Water
D. Calcium
What is not necessary for an organism to survive?
O parents
O water
O energy
O a place to live
Answer:
parents no organism must have a parent live
What is caused by uneven heating and cooling at the Earth’s surface?
Answer:
Wind
Explanation:
A biologist ground up some plant leaf cells and then centrifuged the mixture to fractionate
the organelles. Organelles in one of the heavier fractions could produce ATP in the light,
while organelles in the lighter fraction could produce ATP in the dark. The heavier and
lighter fractions are most likely to contain, respectively,
Answer:
Chloroplasts (heavy) and Mitochondria (Light)
Explanation
Light dependent reactions of photosynthesis (in chloroplasts) produce ATP only when exposed to light. Mitochondria respirates and produces ATP regardless.
Which class of macromolecules store and communicate genetic information
describe peptide bonding and provide an example
Answer:
A peptide bond is a covalent bond formed between two amino acids. Living organisms use peptide bonds to form long chains of amino acids, known as proteins. Proteins are used in many roles including structural support, catalyzing important reactions, and recognizing molecules in the environment. A peptide bond is therefore the basis of most biological reactions. Forming peptide bonds is a requirement for all life, and the process is very similar in all forms of life.
Explanation:
Answer:
peptide bond is a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of other molecules.
examples: hormone oxytocin
In what way is all life completely dependent on leaves?
Answer:
leafs have oxygen just as trees do and they produce it in a similar way
Why is a complex food web better than a simple food chain for the survival of the community?
Why is the study of biology important
what is the process of water moving down through the soil called?
A. evaporation
B. percolation
C. condensation
D. transpiration
Answer:
The answer is B the girl is wright
The process through which the water moves down in the soil is known as percolation. Therefore, option "B" is correct.
What is percolation?The slow movement through a surface that has tiny openings or spaces in it. The tiles prevent water from percolating by sealing off the soil. The value of soil as a crop soil is largely determined by its rate of infiltration which is the rate at which water enters a soil) and percolation (the rate at which water moves through a soil.
These two variables impact the development of normal untamed life environments and the nature and speed of flooding in a given region. The process occurs gradually.
Therefore, the process of percolation is a physical process that helps in water drainage.
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How many letters in total make up your genetic code?
O 3 billion
O 6 trillion
O 3 trillion
O 6 billion
type a paragraph describing how the circulatory and respiratory systems work together to deliver oxygen to the body tissue and remove carbon dioxide
The respiratory system brought oxygen to the blood and, by the circulatory system, the oxygen from the blood reaches the heart, and from the heart to the cells.
What is the respiratory system?The respiratory system helps us to respire and reach oxygen to the blood, from there it goes to cells to carry out the process.
The circulatory system circulates the blood to the whole body.
The respiratory system brings oxygen to the blood, and the circulatory system circulates the oxygenated blood to the cells.
Thus, that's how they work together.
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Which part of our control system is working our brain decides if the pressure the
skin feels is a problem?
A. Sensors
B.communication center
C.control center
D.targets/Response
Answer:
C. control center
Explanation:
I don't know if I'm right, but hope this helped
Which form of active transport is being shown below?
Answer:
Sodium-Potassium pump, Exocytosis, and Endocytosis are forms of active transport.
Explanation:
We can say the transport is active transport if there is energy used in the transportation of molecules from one place to another. Active transport is a type of transport in which energy is used in the form of ATP for the movement of molecules from one place to another. Forms of active transport are Sodium-Potassium pump, Exocytosis, and Endocytosis. in Exocytosis, cells transport molecules out of the cell by using energy while in Endocytosis, cells absorb molecules from outside by using energy. In Sodium-Potassium pump, the Sodium and Potassium ions are transported by using energy.
PLEASE NEED HELP IN BIO!!! The diagram below represents a biological process involving DNA. What process is represented?
translation
replication
mutation
transcription
Answer:
A
Explanation:
Because
Answer:
B, Replication.
Explantion:
I took the test.
The following figure shows a plant cell immediately after it has been placed in distilled water (A) and a plant cell that has been in distilled water for several minutes (B). Determine whether each of the following statements is true or false based on this figure.
Drag True or False to the end of each statement.
Plant cell A has lower water potential than cell B.
Plant cell B is isotonic to the fluid in the beaker.
Plant cell B's water potential increased due to an increase in solutes inside the cell.
Plant cell B is at equilibrium with the fluid in the beaker.
Plant cell A has higher water potential than cell B.
Plant cell A is at equilibrium with the fluid in beaker.
Answer:
Plant cell A has lower water potential than cell B. True
Plant cell B is isotonic to the fluid in the beaker. True
Plant cell B's water potential increased due to an increase in solutes inside the cell. False
Plant cell B is at equilibrium with the fluid in the beaker. True
Plant cell A has higher water potential than cell B. False
Plant cell A is at equilibrium with the fluid in beaker. False
Explanation:
Plant cell A has lower water potential than cell B. True
This statement is true because the water potential of A is -2 bars while that of B is zero bars.
Plant cell B is isotonic to the fluid in the beaker. = True
Isotonic solutions have equal water potential. Since the water potential of distilled water is zero and that of plant cell B is zero as well, plant cell B is isotonic to the fluid in the beaker.
Plant cell B's water potential increased due to an increase in solutes inside the cell = False.
An increase in solute inside the cell doe not increase water potential but rather reduces it.
Plant cell B is at equilibrium with the fluid in the beaker. = True
Plant cell B is at equilibrium with the fluid in the beaker because its water potential is zero since the negative solute potential is counterbalanced by the positive pressure potential.
Plant cell A has higher water potential than cell B = False.
Plant cell A has a lower water potential of -2 bars while plant cell B has a higher water potential of zero.
Plant cell A is at equilibrium with the fluid in beaker. = False.
Plant cell A is not at equilibrium with the fluid in the beaker, rather due to its negative water potential, water will move into the cell.
What happens when there is bias in an experiment?
Answer:
Then the experiment can be skewed towards one point of view instead of the solution.
Explanation:
Calibri is the superior font and green is the superior highlighter
How does evaporation relate to a liquids heat capacity (Will give brainy!!!!)
Answer: Heat of vaporization of water
That is, water has a high heat of vaporization, the amount of energy needed to change one gram of a liquid substance to a gas at constant temperature.
Explanation: Because It changes to a gas to the temperature.
In humans and other multicellular organisms, which substance plays a central role as an
energy source?
water
fats
O carbohydrates
proteins
Explanation:
Carbohydrates are the main energy source of the human diet.
Fats are also a source of energy but fats are the slowest source of energy.
In humans and other multicellular organisms Carbohydrates plays central role as an energy source.
Carbohydrates are the nutrients most frequently used as an energy source, as they are fast-acting and turn into energy as soon as they are ingested. This energy powers the brain and body.
What are the Carbohydrates?A carbohydrate is a biomolecule consisting of carbon (C), hydrogen (H) and oxygen (O) atoms, usually with a hydrogen–oxygen atom ratio of 2:1.
Carbohydrate is a synonym of saccharide, a group that includes sugars, starch, and cellulose.
The saccharides are divided into four chemical groups: monosaccharides, disaccharides, oligosaccharides, and polysaccharides.
Importance of Carbohydrates:
- Serves as energy store and structural and structural components.
- Backbone of genetic material RNA
- Central to nutrition and found in variety of natural and processed foods.
Cereals, potatoes, fruits, and sugars are rich in carbohydrates.
Fats as an Energy Source:
Fat is an important component of a diet designed to fuel exercise. Fat provides the main fuel source for long-duration, low- to moderate-intensity exercise.
Fat to fuel exercise has three key parts:
Digestion: Fat is slow to digest and be converted into a usable form of energy. This process can take up to six hours.
Transportation: After the body breaks down fat, it needs time to transport it to the working muscles before it can be used as energy.
Conversion: Converting stored body fat into energy takes a great deal of oxygen, which requires decreased exercise intensity.
Protein as an energy source:
Protein is what is known as a macronutrient and is responsible for a large portion of the body's energy supplies.
Only a small amount of protein is directly converted into energy, because it isn't stored away in the body like carbohydrates and fats.
Protein isn't the ideal source for energy but present it in the diet is crucial to maintain high energy levels.
Protein also helps in maintaining muscle mass, which in turn supports a healthy metabolism rate.
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BRAINLIEST AND 100 POINTS
Describe budding in yeast plants.
Answer:
yeast cells produce asexually by asymmetric division process called budding,in yeast budding usually occurs during the abundant supply of nutrition
Explain why the rate of cell division differs among different somatic cells.
3. The cycle of oxygen through the atmosphere is closely tied to point) O the carbon cycle. the phosphorus cycle. O the nitrogen cycle. O the water cycle.
Answer:
water cycle
Explanation:
I just took the test
)Why is photosynthesis so important to life on Earth?
Answer:Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. ... Green plants and trees use photosynthesis to make food from sunlight, carbon dioxide and water in the atmosphere: It is their primary source of energy.
Explanation:
How do pH and temperature effect enzyme activity?
Explanation:
Raising temperature generally speeds up a reaction, and lowering temperature slows down a reaction. However, extreme high temperatures can cause an enzyme to lose its shape (denature) and stop working. pH: Each enzyme has an optimum pH range. Changing the pH outside of this range will slow enzyme activity.
Which of the following occur during the G1 phase of the cycle? Check all that apply
Answer:
G1 is an intermediate phase occupying the time between the end of cell division in mitosis and the beginning of DNA replication during S phase. During this time, the cell grows in preparation for DNA replication, and certain intracellular components, such as the centrosomes undergo replication.
plz mark brainliest
Cell growth begins
Proteins are synthesized
Which is NOT an example of active transport
A. Osmosis
B. Membrane pumps
C. Exocytosis
D. Endocytosis
Answer;
A.Osmosis
Wish this will help you
Diffusion is a type of passive transport. Which of the following are also considered characteristics of diffusion? Select all that apply
WILL REWARD AND BRAINLIEST
a. Helps oxygen cross the cell membrane easily
b. Moves against the concentration gradient
c. Works from a region of higher concentration to one of lower concentration
d. Does not require energy
Answer:
All options are correct
Explanation:
Answer:
A,D and C are the answers
Explanation:
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Describe how these gases act like a “thermal blanket.”
Answer:
The gases act like a thermal blanket cause they trap heat and warming the surface rather than allowing the heat to escape into space
Explanation:
