Both strands of the DNA double helix contain nitrogenous bases held together by hydrogen bonds. In DNA, the sequence of nitrogenous bases varies widely. What is the significance of the nitrogenous bases?

A. They determine the amino acids in the proteins synthesized.
B. They prevent mutations from occurring in the process of DNA replication
C. They help complete the sugar-phosphate backbone of DNA molecules.
D. The amount of adenine and cytosine determines the length of the gene on a DNA molecule.

Answers

Answer 1

Answer:

A

Explanation:

Essentially, in the process of protein synthesis, there is first transcription where mRNA is synthesized off of a DNA strand with complementary nitrogenous bases. After processing occurs (in basic terms the mRNA is literally processed) and the mRNA strand leaves the nucleus, it attaches to a large and small ribosomal subunit (a ribosome) where translation occurs. The gist of it is when the mRNA strand is being read by the ribosome. tRNA will come over and bind temporarily bringing with it a specific amino acid, starting the formation of the polypeptide/amino acid chain. Nitrogenous bases play into this as the sequence of the nitrogenous bases is what determines what tRNA will bind onto it which determines which amino acid is brought. More specifically, this deals with the codons of the mRNA and the corresponding anticodons with the tRNA, which is a bit of a more specific topic.

Answer 2

The nitrogenous bases help complete the sugar-phosphate backbone of DNA molecules. The correct option is C.

What is DNA?

DNA, also renowned as deoxyribonucleic acid, is a complex molecule that includes all of the information required to construct and retain a lifeform.

DNA is found in the cells of all living things. In real sense, as in almost every cell in a multicellular organism contains the entirety of the organism's DNA.

DNA is composed of chemical key components known as nucleotides. These building blocks are composed of three components: a phosphate group, a sugar group, and one of four different types of nitrogen bases.

Nucleotides are linked together in chains, with the phosphate and sugar groups alternating.

Thus, the correct option is C.

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Related Questions

What organelle is attached to the Rough ER

Answers

Answer:

Ribosomes

Explanation:

Answer:

The ribosomes.

Explanation:

When you stop growing, your cells stop dividing.
True
False
Help please

Answers

Answer:

Absolutely not mitosis and meiosis don't stop until your heart stops beating.

It is false that When you stop growing, your cells stop dividing.

When you stop growing, it does not mean that all your cells stop dividing. In fact, cells in the human body continue to divide and replenish throughout life, albeit at different rates depending on the type of cell.

The human body is composed of various cell types that have different lifespans and rates of cell division. For example, cells in the skin, gastrointestinal lining, and blood undergo continuous division and turnover to replace old or damaged cells. These tissues are constantly renewing themselves.

However, some cells, such as neurons in the brain and muscle cells, have limited or no capacity for cell division after a certain stage of development. These cells primarily grow in size rather than dividing to create new cells. Therefore, not all cells in the body continue to divide once growth stops.

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What is a pathway for an atom (carbon)

Answers

Answer:

--    --

)____(

Explanation:

The carbon atom can make a transition between photosynthesis and respiration because the carbon atom is both a reactant and a product. For example, plants take in carbon dioxide for photosynthesis which releases oxygen. Then other organisms use this oxygen for respiration, which releases carbon dioxide.n:

Which statement best describes the movement of sodium ions across the cell membrane?
They are hydrophilic, so their movement needs to be facilitated by transport proteins.
They are hydrophobic, so their movement needs to be facilitated by transport proteins.
They are hydrophilic, so they easily pass across the cell membrane on their own.
They are hydrophobic, so they easily pass across the cell membrane on their own.

Answers

Answer: A. They are hydrophilic, so their movement needs to be facilitated by transported proteins.

Explanation:

The two main zones within the A climate are

Answers

Answer:

The Earth has three main climate zones: tropical, temperate, and polar. The climate region near the equator with warm air masses is known as tropical. In the tropical zone, the average temperature in the coldest month is 18 °C.

The climate has three main zones such as tropical, temperate, and polar.

What are Earth's climatic zone?

A climate zone refers to a condition by observing different factors like temperature, humidity, precipitation, season and natural vegetation of an area.

Earth's climate zones is surrounded by the horizontal belts of different climates such as tropical, dry, temperate, continental, and polar zones.

Firstly, Tropical climate zones which present near the Equator of earth and have high temperatures and high precipitation, while Dry or arid climate zones shows high temperatures  and little annual precipitation.

Similarly temperate climate zone observed  Earth’s middle latitudes and shows wider temperature and seasonal variations are more distinct.

Continental climate zone observed in mid-latitudes, shows swing of  temperatures  from cold in winter to warmer, where as polar climate zones shows harsh climate which cannot to support vegetation.

Hence, major zones are tropical, temperate, and polar.

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How many times does cytokinesis occur in Meiosis?

Answers

Answer:

Two Times

Explanation:

In meiosis, cytokinesis must occur twice: once after telophase I and again, after telophase II.

Select the correct answer.
Jayden is taking a test. He has to write why scientists support the theory that life began near hydrothermal vents in the ocean. Which point should he include in his answer?
A.
Hydrothermal vents were closest to ocean surface, and therefore could receive oxygen.
B.
Oceans were dry and only had water near the hydrothermal vents in the earlier ages.
C.
Even today, all life forms are first born near hydrothermal vents and they later migrate to land.
D.
Fossils of archeabacteria, which are early common ancestors, were found near hydrothermal vents.

Answers

Answer:

The answer is; D

Archaebacteria are early life forms on earth. They utilized the process of chemosynthesis to make organic molecules from inorganic molecules and for energy. The word archae means ‘ancient’ life forms. These single-celled organisms evolved around sulfur-rich environments of the hydrothermal vents.

Answer:

D

Explanation:

The endocrine glands
a. transmit information from the sensory organs to the brain.
b. secrete hormones directly into the bloodstream.
c. are instrumental in producing myelin, which protects the neurons.
d. secrete neurotransmitters into the brain.

Answers

Answer:

B.secrete hormones directly into the bloodstream

Fill in the blank with the appropriate directional term to complete the following sentences as if a body is in anatomical position. More than one answer may be correct. Use terms from the previous slide.

The heart is to the lungs.
The knee is to the hip
The wrist is to the hand
The mouth is to the nose.
The thorax is to the abdomen
The thumb is to the ring finger
The sternum is to the heart
The skull is to the scalp
The ears are to the nose
Dorsal refers to the of the human body, while ventral refers to the of the human body

WORDS:
.
Deep Front Anterior Proximal Superficial Posterior Inferior Superior Distal Back Medial

Answers

Explanation:

Dorsal is posterior(back). Ventral is anterior(Front)

What is chemosynthesis?
• How do chemosynthetic organisms get energy? Some examples of organisms include colorless sulfur bacteria, iron bacteria, and giant tube worms (Riftia parchyptila).

Answers

Answer:

By making reactions between elements or compounds.

Explanation:

Sulfur bacteria use sulfur as their main source of energy. We can say that they eat sulfur as you eat a burger or a fruit salad. This is the samething for iron bacteria.

Which is larger change in temperature, 1°C or 1°F?

Answers

Answer:

1°C

Explanation:

1 °C =  33.8 °F

Answer:

1°C

Explanation:

The model represents the change in the DNA content of a cell during the cell cycle. DNA Content During the Cell Cycle 22 1 Complete Sets of DNA in Nucleus 1 Ceciclease​

Answers

Answer:

Explanation:

To late?

Although Natasha is a brilliant pianist snd highly acclaimed ballet dancer, her high school intelligence test scores were only average. What does Natasha’s experience suggest regarding the nature of intelligence

Answers

Answer:

It suggests she have bodily-kinesthetic intelligence according to Howard Gardener's theory of multiple intelligences.

Explanation:

Howard Gardener's theory of multiple intelligences suggests that there are eight different types of intelligence instead of a single generalized one. Bodily-kinesthetic intelligence is one of them that is the ability to skilfullly use the body or its parts.

Natasha's experience tells that she may be high on this specific kind of intelligence as athletes like her and dancers like her are high on bodily-kinesthetic intelligence.

What caused Antarctica’s climate to change from a more temperate climate to its current climate?
A)
isolation from the other continents
B)
El Niño
C)
being surrounded by ocean
D)
volcanic eruptions
E)
all of the above

Answers

Answer:

E

Explanation:

Answer:

E) All of the above

Explanation:

Got it right on the test

What metal can be shaped using just your hands

Answers

Answer:

gallium

Explanation:

There's a metal that's so soft that it can melt at just under 30°C (85.6°F). This is known as gallium, and after playing around with it in your hands for just a couple of seconds, it will quickly liquefy.Se

CAN SOMEONE HELP ME WITH THE PICTURE ABOVE
thank you

Answers

Answer:

B.

Explanation:

2% better off

1 Sustainability means: A. Meeting present needs without compromising needs of future generations B. Meeting present needs without the concern for future generations C. Ignoring the needs of current generations to help future generations D. Sustaining fish at a certain depth in the ocean 15 (1 Point)​

Answers

Answer:

A

Explanation:

DNA replication results in two DNA molecules,

Answers

DNA replication results in two DNA molecules,
each with one new strand and one original strands.

Hope this helps!


I need help with this this i don’t get this

Answers

Answer:

D because the others have nothing else deals with an empty garden that has an effect on things

Explanation:

4. The top part A of the flask-shaped reproductive organ X in the flower of a plant secretes a surgery substance
into its lower part B which goes towards the bottom part of the flask-shaped organ. When a tiny grain D
coming from the top part E of another reproductive organ Y in the flower falls on part A, it grows a long
tube F through the organ X in response to the sugary substance and reaches the bottom part C of flask-
shaped organ to carry out fertilisation.
(a) What is (i) organ X, and (ii) organ Y, inside the flower ?
(b) Name parts (1) A (ii) B, and (iii) C, of flask-shaped organ.
(c) Name (i) grain D, and (ii) part E of organ Y.
(d) Name the tube F.
(e) What is the phenomenon of growing a long tube in response to a sugary substance in the process of
fertilisation in a flower known as ?​

Answers

Answer:

X- pistil

Y- stamen

A-stigma

B-style

C-ovary

D- pollen grain

E- anther

F- pollen tube

Is the cladogram pictured here correct? Does it accurately represent the cladistic relationships between these species based on their derived characteristics? Why or why not?

Answers

Answer:

The cladogram is correct.  The further explanation is given below.

Explanation:

As with most other species excluding lamprey, paired arms and legs are established. In any organism except lamprey as well as tuna, paired legs become available. Throughout all animals, except lampreys, tuna, certain bullfrogs, the amniotic membrane seems to be preserved. In kangaroos, rhesus monkeys including people, mammary glands were only ever available. The placenta has only been found throughout rhesus monkeys and also in humans. Foramen magnum forward will be exclusively found in humans.

Pedigree D is most likely X-linked dominant. What is/are the genotype(s) of the parent(s) that transmitted the mutant allele(s) to their offspring

Answers

Answer and Explanation:

Note: In the attached file you will find the pedigree and the genotypes of each member.

Parentals)  XDXd    x     XdY

The female is heterozygous for the trait, transmitting the mutant allele The male is not affected.

According to the pedigree, they had the following progeny:

XdXd healthy femaleXdY healthy maleXDXd affected female (this individual transmitted the mutant allele)XDY affected male (this individual transmitted the mutant allele)

-Both healthy individuals mated with another two healthy individuals. Their whole progeny was healthy.

-The affected female (XDXd) mated with a healthy male (XdY), and they produced 100% healthy individuals

-The affected male (XDY) mated with a healthy female (XdXd) and they had three affected females, XDXd.

What performs more functions human cells or bacterial cells and why

Answers

Human cells are eukaryotic which means they are more complicated, bacteria cells are prokaryotic which means they are simpler and viruses are not even cells at all, they are just genetic material in a protein shell. Not all bacteria make us sick, most actually help us have emunity to the virus. Hope this helps

Answer:

It is human cells

Explanation:

What is a scientific theory? Make up your own scientific theory.

Answers

Answer:

A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not guesses, but reliable accounts of the real world.

Explanation:

I hope this helps :)

What is a fourth order consumer

Answers

The fourth order consumer is called the ''quaternary'' consumer. It is an animal that eats a third order consumer. So if a duck was a third order consumer, and a snake was a fourth, then the snake would consume the duck.

in one to three sentences describe what happens during the regeneration stage of the calvin cycle

Answers

Answer:

In stage 1, the enzyme RuBisCO incorporates carbon dioxide into an organic molecule, 3-PGA. In stage 2, the organic molecule is reduced using electrons supplied by NADPH. In stage 3, RuBP, the molecule that starts the cycle, is regenerated so that the cycle can continue.

Explanation:

Define essential nutrient.

Answers

Answer:

Here:

Explanation:

They are nutrients that are not produced inside your body but your body needs it to survive. One example is Omega-3 fatty acid which is an essential fatty acid.

Answer:

Substance that must be obtained from the diet because the body cannot make it in sufficient quantity to meet its needs.

Explanation:

Hope this answers your question :)

If a cell does not go through the Sphase of the cell cycle before mitosis, what might be wrong with the daughter cells?

Answers

Answer:

Synthesis is the phase of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase. Since accurate duplication of the genome is critical to successful cell division, the processes that occur during S-phase are tightly regulated and widely conserved.

Explanation:

If a cell has not properly copied its chromosomes or there is damage to the DNA, the CDK will not activate the S phase cyclin and the cell will not progress to the G2 phase. The cell will remain in S phase until the chromosomes are properly copied, or the cell will undergo programmed cell death.

Each step in the cell division is controlled and regulated by proteins like Cyclins. If a cell does not go through the S phase, it can not go to the G2 phase until the replication process is completed, or until it's programmed cell death.  

-----------------------------------------------

As the cell passes through different steps of cell division, there are auto control mechanisms to ensure that the step was correctly performed and the cell is ready to go to the next step.  

Many regulator molecules act during the different stages of the mitosis process to make it possible.

There are too many factors interacting, activating, and deactivating to pass from one stage to another.

Cyclins are proteins that regulate the whole cell cycle. There are different types of cycling, each of them acting on a different stage.

When the cell is going through one of the stages, the only cyclin in high levels is the one that is regulating that cycle.

Once that stage is over, that cyclin concentration decreases, and the following one increases.

But if any step was not correctly performed, the cell can not pass to the following one.

During the S stage of the interphase occurs the DNI replication process.

At this point, also occurs the synthesis of histones and other associated proteins.

This is the only stage where the DNI molecule is replicated.

S phase cyclins are in charge of regulating the stage of DNA replication.

If the cell does not go through the S phase, the cyclins of this stage are not activated. And if S phase cyclins are not active, the cell can not go to the G2 phase.  

The cell remains in the S phase until the DNA replication process is correctly done. And if it does not occur, the cell suffer programmed cell death.

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HELPP PLEASE!!

What is a subjective claim?
A claim based in personal opinion.
A claim that covers two subjects or topics.
A claim based on verifiable fact.

Answers

Answer:

A

Explanation:

its a expression of belief, opinion, or personal preference

5.
What can scientists measure to provide evidence that electrons can move from one energy level to another?
1.the angle of deflection of alpha particles
2.the number of electrons deflected by a thin sheet of gold foil
3.the energy absorbed or released by atoms

Answers

It's number 2. It's an interesting experiment, you can watch multiple on

Answer:

2.the number of electrons deflected by a thin sheet of gold foil

Explanation:

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