what is a DNA structure

Answers

Answer 1

Answer:

DNA is a two-stranded molecule that appears twisted, giving it a unique shape referred to as the double helix. Each of the two strands is a long sequence of nucleotides or individual units made of: a phosphate molecule. a sugar molecule called deoxyribose, containing five carbons.


Related Questions

At what stage in prenatal development do vital organs begin to form?.

Answers

Answer:

embryonic stage

Explanation:

the embryonic period, or period of organogenesis

Which cells are no longer capable of carrying out the process of dna transcription?.

Answers

The cells that is no longer capable of carrying out the process of DNA transcription is the Tracheids cells.

Tracheids cells

They are a long and tapered lignified cell in the xylem of vascular plants. The main functions of tracheid cells are to transport inorganic salts and water, and they also provide structural support for trees.

Therefore, tracheids cells is the cell which is no longer capable of carrying out the process of dna transcription.

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An aquarium is a small closed container in which a selection of living plants and small marine animals are kept and observed. What kind of system is modeled by this setup? A) a wet B) a zoo C) a fish D) an ecosystem

Answers

Answer:

An ecosystem (D)

Explanation:

An ecosystem is a community of interacting organisms and their environment.

In scenarios 2 and 3, the simulation settings are such that it takes 30 days to run the vaccination campaign and 14 days to develop immunity. Explain the logic behind these setting choices. Hint: there are two reasons, one is biological and one is logistical.

Answers

The two possible reasons for these setting choices are that it takes to the body around 14 days to develop immunity and that vaccinating a lot of people is logistically demanding.

What are vaccines?

Vaccines are biological substances that help the body develop immunity against a virus, bacteria, etc. This is possible because vaccines contained a weakened or modified version of the pathogen that would help the body secrete specific antibodies for the real pathogen.

What is the possible reason for the 14-day setting?

Immunity does not occur immediately, indeed, it takes the body up to 14 days to build up immunity. This includes the modern vaccines.

What is the possible reason for the 30-day setting?

On the other hand, giving vaccines to large populations is quite demanding and challenging. Due to this programs with multiple weeks including four-week programs are ideal.

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What is the main difference between adult and embryonic stem cells

Answers

Answer:

A variety of adult stem cells can be found, but embryonic stem cells are derived from the three germ layers. The main difference between adult and embryonic stem cells is that adult stem cells are multipotent whereas embryonic stem cells are pluripotent.





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Explanation:

Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for.

Answers

Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for contraction.

What is muscle tissue?

Muscle tissue are body tissues that are made up of cells, these cells helps to produce movement of the various body part.

This movement are enhance through contraction of the muscle and the tissue are adequately supplied with blood vessels.

Therefore, muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for contraction.

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What happens when plants don't get sunlight in space

Answers

Answer:

plants deprived of light will lose their colour and die

Explanation:

the lack of sunlight stunted photosynthesis and therefore the sprouts were not able to produce the chlorophyll needed to treat a green colour

What is alternation of generation

Answers

Alternation of generations is a type of life cycle in which subsequent generations of plants alternate between diploid and haploid organisms.

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The female gametophyte is a _______ structure called an embryo sac, while the male gametophyte is a _______ structure called a pollen grain. When pollen attaches to the stigma of a flower, one of the sperm cells fertilizes an egg cell, producing a _______ zygote. Another sperm cell fertilizes the polar nuclei, forming a ________ endosperm. The _____ will eventually develop into the sporophyte.

Answers

The answers to the blank spaces in the question are as follows:

HaploidHaploidDiploidTriploidZygote

What is double fertilization?

Double fertilization is a specific feature of angiosperms involving two male gametes and one female gamete.

In double fertilization, both the female and male gametes are haploid structures i.e. contain one set of chromosome.

One of the haploid sperm cells fertilizes an haploid egg cell, producing a diploid (2n) zygote. However, the other sperm cell fertilizes the polar nuclei, forming a triploid endosperm.

The zygote will eventually develop into the sporophyte (vegetative plant).

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Keeping blood in the different chambers of the heart from mixing is a function what structure?.

Answers

Answer:

Muscular walls, called septa or septum, divide the heart into two sides and keep the two kinds of blood from mixing. Heart valves There are four valves within the heart. Each valve has flaps that prevent blood from flowing in the wrong direction — opening to allow forward flow of blood and closing to prevent backward flow.

Explanation:

Which actions could be categorized in the “both” section of the Venn diagram?
Check all that apply.

requires oxygen

starts with glycolysis

occurs in the mitochondrion

produces ATP

Answers

Answer:

Starts with Glycolysis

Produces ATP

Explanation:

I just took it

The action that occurs in the mitochondrion starts with glycolysis requires oxygen and produces ATP.

What is glycolysis?

Glycolysis is the metabolic pathway that converts glucose into pyruvic acids. The free energy released in this process is used to form the high-energy molecules adenosine triphosphate ATP. Glycolysis is the process of aerobic respiration.Net gain of two ATP.NADPH is also produced.

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In plants, the vascular tissue made of dead cells that transport water and minerals from the roots is called.

Answers

Answer: xylem

Explanation: xylem is a plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support.

When psychological symptoms interfere with daily life they are considered

Answers

When psychological symptoms interfere with daily life they are considered dysfunctional.

Why are these symptoms considered dysfunctional?

Dysfunctionality is when we are not able to function as what society considers to be normal. These symptoms are considered dysfunctional given that they are preventing us from completing the normal everyday tasks that are expected of us.

Therefore, we can confirm that when psychological symptoms interfere with daily life they are considered dysfunctional.

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When psychological symptoms interfere with daily life they are considered as dysfunctional.

What is dysfunctional?

For instance, an person experiencing delusions that he's an all-powerful deity could have a breakdown in cognition due to the fact his idea methods aren't regular with reality.

Dysfunction consists of disturbances in a person's thinking, emotional regulation, or conduct that displays big disorder in psychological, biological, or developmental methods underlying intellectual functioning. In different words, disorder refers to a breakdown in cognition, emotion, and/or conduct.

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In general, the frequency of crossing over between two linked genes depends on what?

How far apart they are on the chromosome
The characteristics that the genes code for
Whether the genes are dominant or recessive
The phase of meiosis in which the crossing over occurs

Answers

Answer:

Crossovers during meiosis happen at more or less random positions along the chromosome, so the frequency of crossovers between two genes depends on the distance between them.

The closer two genes were to one another on a chromosome, the greater their chance of being inherited together. In contrast, genes located farther away from one another on the same chromosome were more likely to be separated during recombination.

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If two genes are far apart, for example at opposite ends of the chromosome, crossover and non-crossover events will occur in equal frequency. Genes that are closer together undergo fewer crossing over events and non-crossover gametes will exceed than the number of crossover gametes.

Use the points of the cell theory to say why humans and bacteria are similar.

Answers

Answer:

Humans have many cells. Bacteria have one cell. The second point is that cells are the basic unit of structure and function in humans and bacteria. The third point is that new human and new bacterial cells come only from other human and bacterial cells.

Explanation:

Which characteristics were first observed in fish?.

Answers

That they swim because it is the most noticeable part of a fish

In and agricultural area, heavy rainfall caused a flash flood. the topsoil from a freshly fertilized field washed into a local stream. as a result, the amount of nitrogen in the water drastically increased, causing algae to grow record levels and cover the surface of the stream. what effect did this bloom of algae have on the stream?

Answers

Answer:

The algae can release harmful chemicals known as "bio-toxins" that can contaminate the water and kill the organisms living in the ecosystem

Explanation:

What do you think influences how fast a river flows?

Answers

Answer:

how ever fast the wind is

Explanation:

Answer:

The shape of its channel, the gradient of the slope that the river moves along, the volume of water that the river carries, and the amount of friction caused by rough edges within the riverbed.

Explanation:

Everything above what I said: is influencing the speed of a river

Which term describes a chemical reaction in which water is gained?

A. Reduction
B. Hydrolysis
C. Dehydration
D. Hydration

I am confused because I thought the answer was dehydration synthesis, but that isn't on here. Please answer as soon as possible. :)

Answers

Answer:

hydration

Explanation:

cuz water is gained and something is hydrated

What is the competitive exclusion principle?

Answers

I don’t know tbh I just need points thank you

A student learning about heat transfer makes the claim shown:

"Some metals change temperature more rapidly than other metals."



The student proposes to test the claim in the laboratory by using metal rods made of iron (Fe), copper (Cu), and Aluminum (Al). In addition to the metal rods, which pieces of equipment would be useful for investigating the claim?

Group of answer choices

prism, heat lamp, screen, meterstick

beaker, digital scale, stopwatch, clamps

litmus paper, beaker, pan balance, battery

hot water, pan to hold water, stopwatch, thermometer

Answers

Hot water, pan to hold water, stopwatch and thermometer are the pieces of equipment which would be useful for investigating the claim.

What is Temperature?

This is the degree of hotness or coldness of a substance and it is measured with the use of the thermometer.

Since temperature is involved, the thermometer and heat source are important thereby making option D the most appropriate choice.

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Option D

Well the raising speed of temparature of a metal is dependent upon its specific heat capacity .

If specific heat capacity is more then the water will boil faster .

From stopwatch we can determine how fast the water boils in identical pans .

Which will help in determining specific heat capacity

Which of the following is a typical product of nuclear fission? a. oxygen b. carbon dioxide c. radiation d. water please select the best answer from the choices provided a b c d

Answers

The answer will be :

C. radiation

Answer:

C

Explanation:

Trust thr process Edge 2022

help me with this exammm <3 pls and ty
https://brainly.com/question/27078218

Answers

Answer:

which is an example of interependence between species

Explanation:

Which statement correctly describes a feature of the rock cycle?
O Rocks are preserved through
the process.
O Rocks change from one type to another
Different rock groups are not related to one another.
The rock cycle follows a specific order.
Mark this and retum
Save and Exit
Next
Submit

Answers

Answer:

B

Explanation:

The statement that correctly describes a feature of the rock cycle is: Rocks change from one type to another. In the rock cycle, rocks can be transformed through different processes. The correct option is B.

What is the rock cycle?

The rock cycle is a process by which rocks are transformed from one type to another through a series of physical, chemical, and biological processes. The rock cycle involves the transformation of igneous, sedimentary, and metamorphic rocks, and these three types of rocks are related to one another.

The process of the rock cycle is continuous and does not follow a specific order as rocks can change from one type to another in any direction. The rock cycle is essential to the formation and recycling of rocks on Earth.

Therefore, the correct option is B.

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According to the World Health Organization, persistent organic pollutants (POPs) are found in nearly all tested organism tissues and environmental samples. Which characteristic of POPs accounts for their presence in living tissues and in environmental samples?

Answers

Answer:

POPs are lipophilic, which means that they can be stored in fatty tissues for long periods of time.

Explanation:

Earth orbits the Sun every 365 days, causing seasonal patterns that vary by location. In the winter, the Northern Hemisphere is tilted away from the Sun, and receives the smallest amount of solar energy than any other time of the year. What can be expected in the Northern Hemisphere during this season?
A) warmer temperatures and decreased daylight
B) cooler temperatures and increased daylight
C) warmer temperatures and increased daylight
D) cooler temperatures and decreased daylight

Answers

Answer:

D) cooler temperatures and decreased daylight

Viruses ___________________________________________________.


are living because they reproduce with help from a host.


are not living because they do not grow.


are not living because they do not respond to stimuli.


are living because they have organelles.

Answers

Are not living because they do not respond to stimuli

What are similarities of the skull?

Answers

Answer:

It can provide a fascinating perspective on how animals are related.

Which two main clades branch from the most recent common ancestor of the eumetazoans?.

Answers

Answer:

Rotifera and Deuterostomia

Explanation:

hope this helps

GOD BLESS

Rotifera and deuterostomia

What system plays a vital role in the existence of the human species?


What's the ans?

Answers

Answer:

The reproductive system.

Explanation:

Without the reproductive system, humans are not able to reproduce meaning the human species would go extinct. With the reproductive system, humans are able to create more humans, in this way humans do not go extinct.

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