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Umnica [9.8K]
3 years ago
12

Before replication can take place.(1) A. DNA polymerases must add complementary nucleotides to DNA. B. the two strands of DNA mu

st separate. C. the covalent bonds in DNA must break. D. helicases must break the bonds in the nucleotides.
Biology
1 answer:
andriy [413]3 years ago
4 0

Answer:

The correct answer is B. the two strands of DNA must separate.

Explanation:

DNA is a double-stranded structure. The two strands are joined together by the formation of hydrogen bonds between complementary nucleotides. So before the replication takes place these two strands must be separated.

The separation of DNA strand is accomplished by the action of a helicase enzyme which breaks the hydrogen bond between complementary nucleotides and separated the two DNA strands.  

After separation, the DNA polymerase binds to separated DNA and replicating the DNA. So the right answer is B.

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Answer:

for any behavior to survive natural selection, it needs to help an animal or its genetic material

Explanation:

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2 years ago
Which statement by the nurse is most appropriate when addressing a client with a barbiturate overdose who awakens in a confused
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Which of the following statements by the nurse is most appropriate when addressing a client with a barbiturate overdose who awakens in a confused state and exhibits stable vital signs?

1. "I'm here to help you beat your drug habit. But it's you who will need to work hard."

2. "It's time to get straight and stay clean and put an end to your torture."

3. "I'm glad you pulled through; it was touch and go with you for a while."

4. "You're in the hospital because of a drug problem; I'm one of the nurses who will help you."

Answer:

4. "You're in the hospital because of a drug problem; I'm one of the nurses who will help you."

Explanation:

Clients like the client in the question given above, who is in a confused state, need to be addressed in a calm and reassuring manner and in easy to understand terms. This would enable the client to better understand his situation and allay whatever anxiety that might arise.

Statement 1, 2 and 3 all contain vague and confusing words that seem judgmental, which will only confuse the patient the more and make him anxious.

Statement 4 is the most appropriate statement the nurse can make in addressing the client in his confused state of mind.

8 0
3 years ago
Ii Why can you not produce plumcot seeds through reproduction between two plumcot plants?​
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Answer:

It's a great tree for small properties because you only need one to produce fruit. Pluots are similar fruits. ... The seeds from the cross-pollinated fruit produce a different type of tree that has some characteristics of both trees.

Explanation:

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3 years ago
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Answer:

A. Yes, its an inherited behaviour that helps the goose and its offspring to survive.

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Adaptation could be a trait with a functional role in an individual or animal that is maintained and has also evolved as a result of natural selection.

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2 years ago
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