Which nitrogen base sequence is the partnet of G-C-A-G-C-T? A: T-C-A-G-C-A
B: A-C-G-A-C-T
C: C-G-T-C-G-A
D: A-G-T-C-G-T

Adenine pairs with Thymine and Cytosine with Guanine. Thus :  A-G-T-C-G-T is the correct answer.

Explanation:  According to Watson and Crick DNA base pairing, purine bind to the pyrimidine base whereas each purine binds to a particular type of pyrimidine.

Like adenine (A) binds with thymine (T) and guanine (G) binds with cytosine (C) in a DNA molecule.

Since, the given sequence is T-C-A-G-C-A, therefore, its nitrogen base sequence is A-G-T-C-G-T.

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