what is the role of histone h1? multiple choice question. packaging and compaction of nucleosomes activation of transcription repression of transcription translational repression decondensation of heterochromatin'
Answers
The role of histone h1 is Nucleosome packaging and compaction. The long N- and C-terminal tails of H1 proteins attach to adjacent core particles of nucleosomes and recruit them into an ordered solenoidal array.
What are the role of histone proteins?In biology, histones are highly basic proteins rich in lysine and arginine residues found in eukaryotic cell nuclei. They act as coils around which DNA is wound to form structural units called nucleosomes. The linker histone H1 binds to the DNA entry/exit sites on the surface of the nucleosome core particle to complete the nucleosome. It affects the nucleosome repeat length (NRL) 2 and is required to stabilize higher-order chromatin structures such as the so-called 30 nm fibers.What role do histones play in DNA packaging?Histones are proteins responsible for packaging DNA. DNA wraps histones. Histones are positively charged proteins, so they can readily bind to negatively charged DNA. Histones are also involved in regulating gene expression
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Related Questions
aging is most accurately defined as involving _____ in the maturing organism.
Answers
Answer:
Both negative and positive changes
Explanation:
Aging is most accurately defined as involving both negative and positive changes in the maturing organism.
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Can someone explain this I don’t get it. Please asap test tmr
Answers
2. 50, same as 1
3. 40, can’t pass through barrier
4. 60, same as 3
5. water level rises in side2, lowers in side 1 because 10 grams of liquid passed through barrier
Which lon is most evenly distributed?
Answers
Answer:
Explanation:
It is difficult to give a specific answer to this question as the distribution of ions can vary widely depending on the biological system in question. However, in general, ions that are important for maintaining cellular homeostasis, such as sodium (Na+), potassium (K+), and chloride (Cl-), tend to be distributed relatively evenly across cells and tissues. This is because cells have various mechanisms, such as ion channels and transporters, that help maintain the balance of ions both within the cell and across the cell membrane.
However, certain ions may be concentrated in specific organelles or regions of the cell for specific functions. For example, calcium (Ca2+) ions are often stored in the endoplasmic reticulum (ER) and released upon cellular signaling to trigger muscle contractions or other responses. Similarly, hydrogen (H+) ions are concentrated in the lysosome, where they help to break down cellular waste.
Overall, the distribution of ions in biological systems is tightly regulated and can vary widely depending on the specific ion and its biological function. Therefore, the answer to the question of which ion is most evenly distributed is not straightforward and requires additional context and information.
Which of the following statements regarding antibody function is FALSE?
a.They can prevent virus attachment to host cells.
b. They can penetrate host cells to bind intracellular antigens.
c. They can bind more than one pathogen at a time, forming complexes.
d. They can facilitate cytotoxic attack by natural killer lymphocytes.
e. They can facilitate phagocyte attack on bacteria with a capsule (glycocalyx)
Answers
The false statement regarding antibody function is: b. They can penetrate host cells to bind intracellular antigens.
Antibodies are soluble proteins produced by B cells as part of the adaptive immune response. They play a crucial role in recognizing and neutralizing pathogens or foreign substances in the extracellular environment. However, antibodies cannot penetrate host cells to directly bind intracellular antigens.
The other statements are true because,
a. They can prevent virus attachment to host cells: This statement is true. Antibodies can bind to viral surface proteins, preventing them from attaching to host cells. This binding can neutralize the virus and prevent infection.
c. They can bind more than one pathogen at a time, forming complexes: This statement is true. Antibodies possess a Y-shaped structure with two antigen-binding sites. This allows them to bind to multiple pathogens or antigens simultaneously, forming immune complexes.
d. They can facilitate cytotoxic attack by natural killer lymphocytes: This statement is true. Antibodies can mark infected or abnormal cells by binding to specific antigens on their surface. Natural killer (NK) cells have receptors that recognize the constant region of antibodies, facilitating the targeting and destruction of antibody-bound cells through a process called antibody-dependent cellular cytotoxicity (ADCC).
e. They can facilitate phagocyte attack on bacteria with a capsule (glycocalyx): This statement is true. Bacteria with a capsule or glycocalyx can be more resistant to direct phagocytosis by immune cells. However, antibodies can bind to the capsule or glycocalyx, allowing phagocytes such as macrophages to recognize and engulf the bacteria, enhancing their clearance.
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2. By what time period was all milk pasteurized in the United States?
Answers
Answer:
In 1987,
the Food and Drug Administration (FDA) issued its final regulation on the mandatory pasteurization of all milk or milk products (with the exception of some cheeses) for sale or distribution in interstate commerce.
Answer:1895
Explanation:
In 1895, commercial pasteurizing machines for milk were introduced in the United States. "By 1917, pasteurization of all milk except that from cows proven to be free of tuberculosis was either required or officially encouraged in 46 of the country's 52 largest cities
Certain populations worldwide are much more lactose intolerant than others. Why might this be the case?
Answers
Answer:
Lactose persistence, and therefore lactose tolerance, is inherited as a dominant trait. Lactose intolerance is the result of having two identical alleles of a particular gene or genes. for the recessive lactase allele that is poorly expressed after early childhood.
You basically can get it from your parents.
Water pollution comes from:
biological processes
chemical processes
physical processes
all of the above
Answers
Answer:
I will say chemical processes
Answer:
all of the above
Explanation:
Water Pollution is any physical, biological, or chemical change in water quality that adversely affects living organism or makes water unsuitable for desired uses.
True root and xylem and phloem are present and 1 first true plant
Answers
Answer:
Pteridophytes are the first true land plants with xylem and phloem. Hence, they are called vascular cryptogams.
Explanation:
I think you are talking about this.
A trait that appears, even if one recessive
allele is present
Answers
Answer:
What is the question? :))))))))
What four substances are recycled during photosynthesis and respiration
Answers
Answer:
Carbon Dioxide, Glucose, Water, and Oxygen
Explanation:
Photosynthesis occurs in autotrophic green plants, some bacteria and algae. It uses pigments to absorb light energy to power reactions that make carbohydrates. Respiration is the reverse of photosynthesis because it breaks down carbohydrates to release ATP.
You came in luck! I just learned about this yesterday!! Hopefully this helps you!! Brainliest?? Anyways have a great day! :))
Name and describe 3 ways that water can be extracted, or taken out of an aquifer
Answers
Answer:
A huge amount of water exists in the ground below your feet, and people all over the world make great use of it. But it is only found in usable quantities in certain places underground — aquifers. Read on to understand the concepts of aquifers and how water exists in the ground.
The speed of the rotation of Earth has the greatest effect on which of the following?
Answers
Answer:
?***##################
The speed of the Earth's rotation has the greatest effect on the length of a day.
What happens during Earth's rotation?
The Earth rotates once on its axis in approximately 24 hours, and this rotation determines the length of a day. The Earth's rotation speed is not constant, but it is gradually slowing down over time due to various factors, such as the gravitational influence of the moon. As a result, the length of a day has increased over geological time.
The speed of the Earth's rotation also affects other aspects of the planet, such as the distribution of ocean currents, atmospheric circulation patterns, and the formation and behavior of weather systems. However, the length of a day is the most directly and immediately impacted by changes in the Earth's rotation speed.
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Describe methods of replication and protein synthesis in bacteria and viruses.
How does this differ from eukaryotes.
Answers
Answer:
Explanation:Unlike bacteria, viruses can't survive without a host. They can only reproduce by attaching themselves to cells. In most cases, they reprogram the cells to make new viruses until the cells burst and die. In other cases, they turn normal cells into malignant or cancerous cells.
Regulatory proteins often must be bound to a ____ regulatory element to switch a gene on.
Answers
Bill Nye Evolution Video Questions
1. _______________________ has been going on for billions of years.
2. Genes are made up of_______________________.
3. The chemistry of all living things is the same / different .
4. DNA is considered to be the building blocks of __________________________.
5. A human has 46 ______________________ .
6. Giraffes have long necks so that they can _________________ the leaves that others animals can’t.
7. Evolution by selection is a change that occurs over generations / overnight.
8. A paleontologist is a scientist that studies ___________________________.
9. The study of life through time is called __________________________.
10.Humans have changed the ________________________ faster than most living things can keep up.
11.A fossil can show how life has ______________________ on Earth.
12.Bird feathers and _______________________ scales are made of the same things.
13.A ground sloth lived 12,000 years ago during the __________________________ age.
14.Natural selection is the changes of size and shape of living things in ________________________.
15.Charles ____________________ was the scientist that developed the Theory of Evolution.
Answers
Answer:
1.evolution
2.DNA
3.the same
4.life
5.chromosomes
6.eat
7.generations
8.life through fossils
9.paleotology
10.enviroment
11.changed
12.reptile
13.ice age
14.nature
15.Darwin
The answers are
1. evolution, 2.DNA, 3. Same, 4.life, 5.chromosomes, 6.eat, 7.generations, 8.life through fossils, 9.paleotology, 10.enviroment, 11.changed, 12.reptile, 13.ice age, 14.nature 15.Darwin.
What does the video on evolution suggest ?The process of evolution has been for going on for millions of years. the DNA is a genetic code. The chemistry of the living things is the same. The DNA s considered are building block of life. Humans have 46 chromosomes. A giraffe eats through the long neck. The evolution can lead to the generation of life. The life through the fossils is studied by the paleontologist.
Find out more information about the evolution.
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The diagram shows the movement of water through a plant.
Which sentence best describes how the loss of water from a plant's leaves helps the plant?
A. It causes water to move down into the root system.
B. It causes water to move into the plant's roots. C. It causes the plant's roots to grow toward water.
D. It causes limp guard cells to fill up with water.
Answers
Answer:
Maybe B
Explanation:
The plants lose water through their leave by the process called transpiration. The loss of water causes water to move into the plant's roots. Thus, option B is correct.
What is transpiration?Transpiration is the mechanism by which the plants lose their water through their stomatal pore to the atmosphere. It is best in summers to cool down the temperature of the plants.
The water from the roots, leaves, and stems is forced upwards to the leaves through the openings resulting in cooling. The process of transpiration in leaves is due to the Cohesion-Tension (C-T) mechanism.
This loss of water is beneficial as it goes into the atmosphere again through the water cycle and enters the root system of the plants.
Therefore, option B. the lost water causes the water to move into the roots again is correct.
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a cell has 50% solute and 50% solvent the solution the cell is sitting in has 30% solvent and 70% solute what would happen to the cell if the membrane only allowed active transport of particles to take place
Answers
Answer:
The cell would crenate, the solvent would move in to the cell
Explanation:
From the options ;The cell would crenate, the solvent would move into the solution ( A )
Hello your question is incomplete attached below is the complete question
since the cell has a 50% solute and 50% solvent while the solution where the cell is sitted contains a 30% solvent and a 70% solute. and the cell membrane allows for osmosis. this shows that the solute concentration in the solution is higher than solute concentration in the cell.
The solution is hypertonic ( has a higher solute percentage ) therefore the water ( solvent ) from the cell will move into the solution causing the cell to crenate.
hence we can conclude that the cell would crenate and the solvent would move into the solution
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which bone represents an example of synarthroses?
Teeth.
Knee.
Spine.
Shoulder.
-k12
Answers
From your experience in this lab, discuss how
humans have carried out the same practice as
Adam in terms of plants.
Now out of the ground the LORD God had
formed every beast of the field and every bird of
the heavens and brought them to the man to
see what he would call them. And whatever the
man called every living creature, that was its
name. The man gave names to all livestock and
to the birds of the heavens and to every beast
of the field.
Answers
Answer:
zz
Explanation:
What is the term for the site where the muscle attaches that does not move when the muscle contracts?.
Answers
The origin is the term for the site where the muscle attaches that does not move when the muscle contracts.
It's simple to believe that muscle is muscle, and that the tissues in hearts, tongues, and arms are essentially the same. Mammalian bodies, however, are composed of three distinct muscle types: cardiac, skeletal, and smooth. Organs including our skin, blood arteries, and digestive tracts are made up of smooth muscles. The heart's muscles are called cardiac muscles. Despite how amazing and sophisticated these tissues are, the skeletal muscles are what carry out the bulk of the work.
The muscles that are a part of the skeletal system are known as skeletal muscles. They are voluntary muscles, as opposed to the hearts and stomachs, and one has cognitive control over them.
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Cell theory teaches us that cells are the ?
Answers
Answer:
in biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells. Cells are the basic unit of structure in all organisms and also the basic unit of reproduction.
The three tenets to the cell theory are as described below:
All living organisms are composed of one or more cells.
The cell is the basic unit of structure and organization in organisms.
Cells arise from pre-existing cells.
There is no universally accepted definition of life. Some biologists consider non-cellular entities such as viruses living organisms,[1] and thus reasonably disagree with the first tenet
Explanation:
Answer:
In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.
Explanation:
Two males in the Ibex population competing for mating rights will fight. These two organisms are displaying which of the following social behaviors?
A.) Cooperation
B.) Altruism
C.) Social Hierarchy
D.) Agonistic
Answers
Answer:D
Explanation: it is fighting for a mate, it could lead to hierarchical classification after but this is solely for mating rights so D agonistic
Plz answer correct, it for test
A seismogram shows that P waves travel _____.
at the same speed as surface waves
more slowly than S waves
at the same speed as S waves
faster than S waves
Answers
Answer: P waves are faster then s waves
rhizosphere bacteria benefit their host plant byquestion 49 options:a) degrading plant lignin.b) producing large amounts of photosynthate.c) improving water uptake.d) attracting symbiotic nematodes.e) discouraging growth of plant pathogens.
Answers
Rhizosphere bacteria benefit their host plant in many ways. Out of the given options, the most likely answer is (e) discouraging growth of plant pathogens.
Rhizosphere bacteria are known to produce antibiotics and other secondary metabolites that can suppress the growth of plant pathogens. They can also outcompete pathogenic microorganisms for nutrients and other resources, reducing their ability to cause disease.
In addition, some rhizosphere bacteria can induce systemic resistance in plants, which makes them less susceptible to infection by pathogens.
While improving water uptake and attracting symbiotic nematodes are also potential benefits of rhizosphere bacteria, they are not as direct in terms of plant protection from pathogens. Similarly, degrading plant lignin and producing large amounts of photosynthate are not necessarily benefits that rhizosphere bacteria provide to their host plant.
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Pls help meeeee with that
Answers
Answer:
I have pictures to show of this assignment if you need help
you are stranded on an island with a large bag of grain and two egg laying chickens. Mathematically speaking what is your best eating strategy to have enough energy for survival? use 10% energy rule to support your claim
Answers
Yes. Give the chickens all of the grain to consume, then do so. Eat the chickens eggs while feeding them all the cereal.
Are chickens able to consume cereal?It's acceptable to occasionally eat plain grains like unsweetened Shredded Wheat, Corn Chex, and Original Cheerios. Contrarily, cereals that have been sweetened and are vividly coloured have too much sugar and artificial colouring that poultry (and probably humans) shouldn't consume frequently.
What is the preferred energy source for chickens?All cells require the utilization of carbohydrates as a fuel source because they provide energy quickly. The majority of a chicken's diet is made up of carbohydrates. They are derived from grains of cereal. (corn, wheat, sorghum, barley, rye, millet, etc.)
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please help i’ll give brainliest
Answers
Answer:
its the second answer
Explanation:
Matter can be altered in many different ways. For example, what are all the ways you can change a piece of binder paper? Think
creatively!
Answers
Answer:
Physical changes
Explanation:
Like fold the paper , rip/cut the paper , etc. etc.
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PLZZ MARK BRAINLIEST
explain how weather,climate,and seasons could affect the biotic and abiotic factors of an ecosystem
Answers
Weather, climate and seasons are factors that limit the distribution of different species of living beings in ecosystems, influencing survival and reproduction.
What are the biotic and abiotic factors of an ecosystem?Biotic factors are each of the living organisms of an ecosystem and abiotic factors are all non-living ones such as organic and inorganic substances in the system as well as environmental conditions.
Weather, climate, and seasons could affect these factors in altering the distribution of species, but would also decrease primary production, which would affect survival and growth.
Therefore, we can conclude that the weather, climate and seasons are factors that limit the distribution of different species of living beings in ecosystems, influencing survival and reproduction.
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Which of the molecules from the photosynthesis equation stores the most energy?
Answers
I found it in go ogle hope this helps you!