Question

In: Biology

A DNA strand reads 5'AATCGTAGTC3'. The adjacent strand should read: 3'AATCGTAGTC5' 3'TTAGCATCAG5' 5'TTAGCATCAG3' None of the...

A DNA strand reads 5'AATCGTAGTC3'. The adjacent strand should read:

3'AATCGTAGTC5'

3'TTAGCATCAG5'

5'TTAGCATCAG3'

None of the above

All of the above

Solutions

Expert Solution

Here. the correct option is  3'TTAGCATCAG5'

Explanation -

According to the Watson and crick double-stranded of the DNA, DNA is made up of two strands, the two strands are antiparallel to each other that means that the polarity of one strand of the DNA is from 5' to 3' direction and the polarity of the other strand is from 3' to 5' direction. Also, the nucleotides are incorporated between the two strands. There are two nucleotides which form a base pair. The base pairing is done the basis of the base-pairing rules: the pyrimidines always binds to purines. So following are the possible base pairs:

Adenine and thymine

thymine and adenine

cytosine and guanine

guanine and cytosine

Thus, the given strand is in 5' to 3' direction, it's adjacent strand would be in 3' to 5' direction.

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