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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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Minerals form from magma in predictable patterns in a process know as
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Minerals form from magma in predictable patterns in a process known as Bowen's reaction series.

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3 years ago
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In a cross between a white-eyed female minimonkey and red-eyed male, what percent of the female offspring will have white eyes?
Fudgin [204]

Answer:

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2 years ago
What will happen to the amount of prairie ecosystem if ice age?
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8 0
3 years ago
Where in the lymph node is a dendritic cell most likely associated with a b or t lymphocyte? where in the lymph node is a dendri
Ray Of Light [21]

<span>Cortex</span>

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You've discovered a new plant species in which
valina [46]

Answer:

All the crossing will be like this after realizing it:

Explanation:

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gl x gl

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