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3 years ago

This is the normal nucleotide sequence on a dna strand: A-C-T-G-G-A-T what is a substitution?

Biology

2 answers:

muminat3 years ago

6 0

Answer: The correct answer is -

(C.) A-G-T-G-G-A-T.

Substitution is a type of point mutation (a permanent change in the nucleotide sequence of DNA when one nucleotide base sequence is substituted by another base).

In this question, Cytosine (C) at second position is substituted by Guanine (G) only in option C).

Thus, option C) is the right answer.

jenyasd209 [6]3 years ago

4 0

.) A-G-T-G-G-A-T is substitute

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Which of the following molecular movements is due to diffusion or osmosis? a) The sodium-potassium pump pumps three sodium ions

MrMuchimi

Answer:

The correct answer is b) When a plant cell is placed in concentrated salt water, water moves out of the cell.

Explanation:

Osmosis is the movement of solvent molecules from an area of less concentration of solute to high concentration of solute to equalize the concentration of both the side of the cell.

So water will move outside the cell when any cell will be placed in a concentrated salt water because the concentration of solute is high in salt water and low inside the cell.

Therefore when a plant cell is placed in salt water the osmosis of water takes place from inside to outside the cell. So the right answer is b.

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3 years ago

Dr. Prathma is working with rats to identify the function of a specific area of the brain. He systematically destroys this brain

yanalaym [24]

Answer: Experimetal ablation

Explanation: Experimental abaltion

It can be defined as the most common procedure that is used by the scientists in his laboratory. This procedure includes the removal or destruction of a part of brain for studying the functions of the regions of brain.

Then the behavior of the animal is observed to see which part of the brain is responsible for which type of behavior. This can be an unethical practice so it is not used on human beings and is only used in animals.

4 0

3 years ago

Describe the change in energy according to the Law of Conservation of Energy.

MAXImum [283]

Answer:

Law of conservation of energy is one of the basic laws of the Physics.

Explanation:

According to the Law of conservation of energy, the total energy of an isolated system doesn't change, Energy may be transformed from one to another but the total energy of an isolated system remains constant. There have different forms of energy like- kinetic energy, potential energy, chemical energy, thermal energy , electrical energy. the potential energy is converting into kinetic energy in the water falls. When kicking a football, energy is transferred from the body of the kicker to the ball.

5 0

2 years ago

Read 2 more answers

If two objects are close to each other and the mass of one object increases, what happens to the force of gravity acting between

Rina8888 [55]

Attraction I think, I don't know though

7 0

2 years ago

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The illustration shows biotic and abiotic factors in a pond ecosystem. Which are biotic factors of the pond ecosystem?

Hatshy [7]

Answer:

All organisms that have life, both plants and animals.

Explanation:

You didn't provide an illustration, but I guess I can still help. Biotic factor means that it has life, abiotic means it's not alive (hence the a- at the beginning.) Some biotic factors of a pond ecosystem include: earthworms, fishes, frogs, plants and insects.

5 0

3 years ago