Question

Which nitrogen base sequence is the partner of T-C-A-G-C-A?

O A-C-G-A-C-T

O C-A-G-A-T-G

O A-G-T-C-G-T

OT-C-A-G-C-A

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Answer 1

Answer:

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.

Answer 2

The nitrogen base sequence is the partner of T-C-A-G-C-A is A-G-T-C-G-T.

DNA STRUCTURE:

• DNA is a double stranded molecule made up of nucleotide subunits. It functions to store genetic information for living cells.

• The nucleotide that makes up DNA are four in number as follows: Adenine (A), Cytosine (C), Guanine (G) and Thymine (T).

• According to Chargaff, Adenine pairs with Thymine while Guanine pairs with Cytosine i.e. A-T, G-C.

• Therefore, in a sequence of DNA as follows T-C-A-G-C-A, the other strand will have the following nucleotide sequence: A-G-T-C-G-T.

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