Double-stranded DNA loops around 8 histones twice, forming the nucleosome, which is the building block of chromatin packaging. DNA can be further packaged by forming coils of nucleosomes, called chromatin fibers. These fibers are condensed into chromosomes during mitosis, or the process of cell division.
Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
During DNA packaging, long pieces of double-stranded DNA are tightly looped, coiled, super coiled, and folded so that they fit easily within the cell. This highly compacted DNA is then arranged into structures called chromosomes.
The graph shows how the activity of an enzyme changes at different temperatures. Which statement best describes what happens to the enzyme when the temperature of the reaction increases to 63°C?
A
The enzyme is used up and the reaction reverses.
B
The enzyme begins to decrease the rate of the reaction.
C
The enzyme continues to increase the rate of the reaction.
D
The enzyme changes shape and can no longer speed up the reaction.
Answer
D..The enzyme changes shape and can no longer speed up the reaction.
Explanation:
We are a graph which shows the activity of an enzyme changes at different temperatures.
We have to find that which statement describe what happens to the reaction increases to 63 degrees.
We know that enzymes are biological catalyst and made from proteins .
It does not change in the reaction.
Catalyst increase the rate of reaction but do not any change in the reaction.
Therefore , when temperature increase then rate of reaction increases upto optimized level and then decreases when temperature increases.
Hence,option D is true.
Food shortages, natural disasters, disease, and ____ can reduce population size
Job shortages maybe? It would be a little easier if therewas a selection of coices in this case
Answer:
The correct answer would be - predation.
Explanation:
Predation is one of the limiting factors other than food, natural processes, shelter, temperature, and many others affect the population size. Predation is a relationship between these organisms, where a predator and eats the other organism that is prey.
Decrease in the population size can be caused by these limiting factors such as shortage in food, natural disasters, shelter, and predation.
Thus, the correct answer would be - predation.
please help ! the picture is attached
The answer is c,b,d,a hope this helps
what is the composition of the hair shaft onto which shampoos and conditioners are applied?
The composition of the hair shaft onto which shampoos and conditioners are applied are; keratin, water, lipids, minerals, and pigments (melanin).
The hair shaft is a part of the hair that is situated above the skin. The hair shaft is mostly composed of keratin with water, lipids, minerals and pigments (melanin). The hair shaft contains three layers which are; the cuticle (the thin outer part of the hair shaft), the cortex (the middle part of the hair shaft which is responsible for the texture, strength, and colour of the hair), and the medulla (the deepest part of the hair shaft). The cuticle is the first layer of the hair shaft to be damaged when hair is not treated properly through the use of insufficient shampoo, conditioner, or brushing.
substances like oxygen pass through the cell without the use of energy and move from an area of high concentration to an area of low concentration. this process is called what?
This process is known as diffusion.
Explanation:Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. It happens in liquids and gases because their particles move randomly from place to place.It does not require energy as it is a passive transport.According to above information the transport of oxygen in cells from high concentration to low concentration is diffusion.How is information converted into translation
I think it would be A. From nucleic acids to amino acids.
Hope this helped!
Translation in biology refers to the process where the genetic code from mRNA is deciphered by ribosomes to produce proteins through initiation, elongation, and termination steps.
Translation is the biological process by which the genetic code contained in mRNA (messenger RNA) is read by a ribosome to synthesize a specific protein. This process is crucial for gene expression in all living organisms. Translation can be broken down into several key steps:
Initiation: The ribosome assembles around the target mRNA. The first tRNA is attached at the start codon.Elongation: The ribosome continues to translate the mRNA, one codon at a time, and individual amino acids are added by their corresponding tRNAs (transfer RNAs) to the growing polypeptide chain.Termination: The process ends when a stop codon is reached, and the ribosome releases the completed polypeptide.This conversion from nucleotides to amino acids involves not only the ribosomes and tRNAs but also numerous other enzymes including aminoacyl-tRNA synthetases which play a role in the activation of amino acids.
In summary, translation is the information conversion process that synthesizes proteins by decoding the sequence of nucleotides in an mRNA into a specific sequence of amino acids in a protein.
in some regions, crabs are being threatened because they're popular delicacies in restaurants and common souvenirs for tourists. why do you think it's important to preserve these crabs? can you think of another environmental condition that could affect the population of these crabs?
Answer:
Sample answer:
Like and Rate!!
Robber crabs eat other crabs, which likely controls the smaller crabs’ population. They also break down and digest plant matter in the ecosystem. That water pollution could negatively harm these crabs, especially if it occurs where young larvae live. Pollution could kill or harm some or all of the larvae, causing a drop in their population.
Robber crabs feeds on other crabs and control the smaller crabs’ population. It can be adversely affected by water pollution
What are robber crabs?it can also be referred as coconut crab and is the species of hermit crab.
These crabs can help to break down and digest plant matter present in the ecosystem.
Water pollution could harm these crabs, especially the young larvae. Pollution can kill or harm some of the larvae, causing a decrease in their population.
Thus, it can be concluded that robber crabs feeds on other crabs and control the smaller crabs’ population.
For more details regarding robber crabs, visit:
https://brainly.com/question/9625326
#SPJ2
why are international environmental laws needed?
International environmental laws are needed in order to ensure that the whole world is protected from environmental degradation.
Many pollutants can migrate from the sources where they are released to other places, very distant from the point of release. Often times, pollutants do not recognize international boundaries.
Pollutant gases released in one country may still be detected in another country far away from the country where the gases were released.
As a result of this, it is important to have international laws that set limits concerning the maximum allowable concentration of certain pollutants that can be discharged into air, water or land.
By so doing, the whole world will be protected from the harmful effects of dangerous pollutants.
Learn more: https://brainly.com/question/3940742
Identify the advantages and disadvantages of renewable and Nonrenewable resources
Renewable energy is generally defined as energy that is collected from resources which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat. Renewable energy often provides energy in four important areas: electricity generation, air and water heating/cooling, transportation, and rural (off-grid) energy services.
A non-renewable resource (also called a finite resource) is a resource that does not renew itself at a sufficient rate for sustainable economic extraction in meaningful human time-frames. An example is carbon-based, organically-derived fuel. The original organic material, with the aid of heat and pressure, becomes a fuel such as oil or gas.
need more information
are data that do not support a hypothesis useful ?
Yes. Because the hypothesis is just a proposed explanation pending further investigation. So new data could prove hypothesis wrong.
Answer:
Yes, data that does not support a hypothesis is useful.
Explanation:
As you may already know, a hypothesis is an assumption about something, about some phenomenon, or about a situation. This assumption must be credited or discredited through experiments that will generate data that may support the hypothesis or not support the hypothesis.
In all cases, the data is useful. Data that support the hypothesis prove that the hypothesis is true and can stop being a speculation, to be a truth. On the other hand, data that do not support the hypothesis are useful because they take away the credibility of the speculation, showing that it cannot be carried forward, since it is not true.
In a population of 120 oak trees, 25% of the population has oak wilt disease. What is the number of trees in this population that have oak wilt?
30 total number of oak trees in the given population are suffering from oak wilt disease.
What do you mean by Population?The Population may be defined as the total number of individuals of the same species living in a particular area at a given time.
According to the questions, out of 120 oak trees, 25% of them have oak wilt disease.
∴ 120/100 × 25 = 1.2 × 25 = 30.
Therefore, 30 total number of oak trees in the given population are suffering from oak wilt disease.
To learn more about Wilt disease, refer to the link:
https://brainly.com/question/16779911
#SPJ2
Identify 3 limitations of the tri-component model. (Psychology)
thanks, heaps!
There is usually discrepancy with behaviors and attitudes of the individuals.
That is the reason there are the attitudes in which effective component, behavioral component and cognitive components. The sensitive and emotional reactions or feelings of an individual with one another. Though when an individual behaves with others through actions. The third limitation is when a person has a belief about anything.These above are three limitations of the tri-component model.
The tri-component model has limitations such as oversimplification of attitudes, neglect of situational factors, and potential lack of predictive power for behavior.
The tri-component model in psychology, also known as the ABC model, posits that attitudes consist of three components: affective (emotions), behavioral (actions), and cognitive (beliefs). While this model is helpful for understanding attitudes, it does have several limitations:
Oversimplification: The model may over-simplify the complex nature of attitudes by assuming that the three components always align. In real-life scenarios, these components can sometimes be inconsistent with one another.Neglect of situational factors: The tri-component model tends to overlook the influence of situational factors on attitudes and behavior. People's actions can vary greatly depending on the context, which the model doesn't fully account for.Lack of predictive power: The tri-component model may not always accurately predict behavior. Although attitudes can influence behavior, other factors like social norms and individual differences can also play a significant role.In summary, while the tri-component model offers a valuable framework for analyzing attitudes, it is limited by its potential oversimplification, neglect of situational influences, and occasional lack of predictive power regarding behavior.
Which of the following would be the best way to demonstrate the motion of plates near a divergent fault, using your hands? A. pulling your hands apart B. sliding one hand over the other C. making a fist with each hand, then stacking them D. keeping hands level and parallel to each other, moving one ahead of the other
I think the answer is A
Answer:
A. Pulling your hands apart.
Explanation:
A divergent fault is where two tectonic plates move apart from each other.
Plz help with this science qurstion
I would hope about 50% of the energy you get back from eating something
Help!!!!!!!!!!!!!!!!!!!!!!!1
I think is b but I don’t no
b. is the answer. When the temperature rises particles move faster.
A scuba diver went down 20 feet below the surface of the water. Then she drove down 3 more feet. Later, she rose 7 feet. What integer describes her depth?
Ok. So what you want to do is -20 because it says went down 20 ft. Then -3 more. + 7. -20+-3=-23+-7=16 So you get 16. I hope that helps.
Density worksheet which will float on water. A. Air, b. Corn oil,c. Glycerine, d. Corn syrup, e. Wood, f. Steel, g. Rubber, h. Ice, i. Water
Seeking shelter form the cold is an example of an
Hello there!
Seeking shelter from the cold is an example of Response to Temperature.
This all started with something called Negative Feedback which is a reaction that causing a return to Homeostasis. An example of a negative feedback is thermoregulation of someone's in a situation of being too cold. Thermoreceptors in your skin which are the receptors, send the information that the person is too cold to the Hypothalamus which is the control center. The control center analyzes the information and sends signals through the nervous system to the blood vessels, which are the effectors. Then Vasoconstriction occurs by causing the person to gain heat and return to homeostasis.
Thus, when your body is cold and you are looking for shelter or a blanket or whatever, your body is telling you that. That's how you know if you are too cold or not. This all happened with the three components of the negative feedback, which are the receptors, control center, and the effectors.
As always, it is my pleasure to help students like you.
~Dr. Gary
which isn't a element hydrogen, water, argon, uranium?
water because it's a compound
Water is the only non-element in those choices. There are many ways to figure this out. If you had the periodic table accessible to you, just look on there. If you don't see something on it, it isn't an element. There are only 118 known elements in the world as of today. Another way to do it is to look at the hints that each of their symbols give you. The chemical symbol for hydrogen is H, water is H2O, argon is Ar, and uranium is U. The start of every symbol is a capital letter, so each element only has one capital letter. If there is more than one capital letter in a symbol, then you know there is more than one element inside of that chemical, meaning that it cannot be a pure element, and must be a compound or mixture. Hope that helped! Can I please have a brainliest? :)
Fat around organs
A. Chemical messenger
B. Protection
C. Structure of cell membranes
Answer:
Its B. the next one is structures of cell membranes. The one after this one is chemical message. The one after that one is insulation. mark brainlest plz and yall welcome!!!
Explanation:
Fat around organs is also known as visceral fat or intra-abdominal fat. It serves a protective role in the body. Therefore, option B is correct.
It acts as a cushioning layer and provides insulation to protect the organs from mechanical shocks and impacts. This layer of fat helps safeguard vital organs like the liver, kidneys, and intestines from potential injuries.
While fat is present in various tissues and has numerous roles in the body, including hormone regulation and thermal insulation, the specific function of fat around organs is primarily related to protection.
Learn more about fat, here:
https://brainly.com/question/18934340
#SPJ4
How are the products represented in the chemical equation for photosynthesis?
Answer:
C6H12O6 + 6O2
Explanation:
The product is what the plant releases after photosynthesis. The chemical formula for glucose and oxygen is C6H12O6 + 6O2.
If two people with wavy hair have offspring what percent of their offspring would you excpect have wavy hair?
A 100%
B 75%
C 50%
D 25%
Hi there! The correct answer is C. 50%.
What does gel electrophoresis do?
Gel electrophoresis is a technique used to separate molecules like DNA, RNA, or proteins according to size and charge, by applying an electric field. The molecules move through a gel which acts as a sieve, allowing size-based separation, and the results are visualized using specific dyes.
Explanation:Gel electrophoresis is a laboratory technique used to separate DNA, RNA, or proteins based on their size and charge. The process involves using a gel as a filter to sort the molecules as they are forced through it by an electric field. Because nucleic acids and proteins have different charges under certain conditions, they will move through the gel at different rates. DNA, for example, possesses a net negative charge due to the phosphate groups along its backbone, making it migrate towards the positive electrode. Shorter DNA fragments move through the gel faster than the longer ones due to the gel's sieving effect, allowing for the separation based on size. After the electrophoresis, these separated fragments appear as bands on the gel which can then be stained with a specific dye to make them visible for analysis.
Why does darkness affect the light-independent reactions of photosynthesis?
Why does darkness affect the light-independent reactions of photosynthesis?
Why does darkness affect the light-independent reactions of photosynthesis? Plants stop their daytime activities and rest during the night much like animals do. ... Mitochondria produce sugars more effectively in the darkness than chloroplasts do. Light independent reactions require the energy gathered in the
Darkness affects the light-independent reactions or Calvin cycle in photosynthesis indirectly by halting the production of ATP and NADPH from the light-dependent reactions, which are necessary for the Calvin cycle to synthesize carbohydrates.
Light-independent reactions, also known as the Calvin cycle, in photosynthesis, don't necessarily occur in darkness but are called 'light-independent' because they do not require light to proceed. They use the ATP and NADPH produced in the light-dependent reactions to convert carbon dioxide into carbohydrates. However, the Calvin cycle can be indirectly affected by darkness because the light-dependent reactions, which produce the ATP and NADPH needed for the Calvin cycle, cease without light. Without these products, the Calvin cycle cannot proceed efficiently. Additionally, enzymes like rubisco in the Calvin cycle are also sensitive to light and may be less active in the dark, further reducing the Calvin cycle's effectiveness at night.
In which process does some rainwater soak into the ground and replenish aquifers?
A: Infiltration
B: sublimation C:transpiration
D: evaporation
The answer is A: Infiltration.
A: infiltration because the rainwater is seeping into the ground.
What dose compultion mean
compulsion is the action or state of being forced into do things
The town of Alpine Glen lies at the base of a mountain and next to the Alpine River. In recent months, the people of the town have noticed that the river has become much muddier, and that silt deposits have been building up along the river banks. Which of the following changes to the environment is the most likely cause of the change to the Alpine River?
A. Trees were cleared from a mountainside, causing an increase in soil erosion. B. Cattle or other livestock were introduced to the mountain, causing an increase in soil erosion.
C. A new dam began operating on the river, causing soil to be added to the water.
D. A new power plant increased the river temperature, causing the erosive force of the water to increase.
The answer is A because since the trees are being cut the soil runs off to the river banks
Answer:
Option A, Trees were cleared from a mountainside, causing an increase in soil erosion
Explanation:
The reason behind Alpine river getting muddier is that the surface runoff from the near by catchment areas consist of increased content of soil, clay, silt and debris.
This is possible only when the soil in the surrounding regions is loose enough to be carried away by water. And this is possible only when the trees in the near by areas are cut at a fast rate thereby leaving loose soil behind.
This loose soil is carried by water which drains into Alpine river and thus makes it muddier
Hence, option A is correct
1) Which biome has the most extreme conditions? EXPLAIN your answer!
The Tundra.. IT HAS THE COLDEST TEMPS.
The Tundra is the most extreme condition
Which surface of an epithelial cell lies closest to its blood supply
Answer: Basal surface is the surface of epithelial cell lies closest to its blood supply.
There are three surfaces in the epithelial cell.
1. apical
2. lateral
3. basal
1. Apical surface : This is the surface which faces towards the cell and it is the exposed layer.
2. Lateral surface : This is the surface which is in between the adjacent cells.
3. Basal surface : It is divided into two lamina : Basal and Reticulate.
Basal lamina is made up of glycoproteins and collagen, this lamina remains separated from underlying connective tissue. Basal lamina is in attachment with Reticulate lamina. Reticulate lamina is in contact with underlying connective tissues this arrangement forms a basal membrane for linking the epithelial surface with connective tissue layer or region of blood supply.
Answer: The surface of an epithelial cell which lies closest to its blood supply is called as the Basal surface.
Epithelial cell is primarily composed of two surface-
1) Apical surface- It is exposed to the environment and lies towards the lumen or internal organ cavity.
2) Basal/ Basolateral surface- It is not exposed to the environment. It lies interiorly and attached to the basement membrane via integrin.
Epithelial cells do not have own blood supply. For obtaining nutrients, they are dependent on the blood capillaries which are present in the nearby tissues. For accomplishing this, the basal surface of epithelial cell plays an essential role. The nutrients from blood enters basal surface via basement membrane which is a selectively permeable membrane.
Thus, basal surface of epithelial cells lies closest to the blood supply.
Which of these energy resources is likely to be depleted if these trends continue? A) Coal B) Timber C) Petroleum D) Natural Gas
D) Natural Gas i think is correct sorry if im wrong
Final answer:
Based on the provided information and current trends, petroleum is the energy resource likely to be depleted first, with estimates suggesting exhaustion of known reserves in about 60 years.
Explanation:
Considering the provided information that estimates known reserves of petroleum to be exhausted in about 60 years, and the fact that coal and natural gas have a relatively more abundant supply, petroleum (C) is the correct answer. Natural gas is estimated to run out in about 120 years, and coal is plentiful, comprising over 90% of the world's fossil fuel reserves.
Moreover, coal as a solid is more difficult to mine and ship than petroleum or natural gas, which may also contribute to petroleum being used up first. Thus, based on the information provided, petroleum is the energy resource most likely to be depleted sooner as compared to the others listed.