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Bio question on DNA????????
During DNA replication?
I can't pick which 1
A. complementary nucleotides are positioned by the enzyme helicase.
B. neither strand of parent DNA appears in daughter DNA.
C. complementary base pairs are covalently bonded to one another.
D. only one strand of the parent DNA is copied.
E. the strands of parent DNA are unwound.
4 Answers
- 1 decade agoFavorite Answer
I'd say the closest to right is E. It's just that the entire DNA is not merely unwound, but is only done so a little bit at a time, and held open with helicase.
Both parent strands are copied, and one each strand appears in the two strands of daughter DNA (semiconservative replication). The base pairs are held together by hydrogen bonds.
- Anonymous1 decade ago
E.
They are unwound.
Complimentary base pairs then align against the template strand (they don't covalently bond), to produce an almost-copy of the coding strand (U is used instead of T).
DNA helicase is what unzips the DNA.
One strand is used in the DNA, the other is a new strand.
- Anonymous1 decade ago
E. the strands of parent DNA are unwound.
