Question

DNA molecule has the following sequence
5- CGCATGTAGCGA-3
Write the complementory sequence of the
strand shown above​

Answer 1

ANSWER

In DNA, Adenine (A) pairs with Thymine (T) and Guanine (G) pairs with Cytosine (C).

Hence, on replication of DNA in M phase, complementary nucleotides for each base pair will be added as follows:

A - T

T - A

G - C

C - G

Since replication occurs in 5'-3' direction, so the complementary strand will be formed in 3'-5' direction.

Hence the sequence of complementary strand formed upon replication will be: 3'-TGACGGATACGA-5'

So, the correct answer is 3'-TGACGGATACGA-5'.

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