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In DNA, adenine always pairs with...

In DNA, adenine always pairs with

A

Adenine

B

Thymine

C

Cytosine

D

Guanine

Text Solution

Verified by Experts

The correct Answer is:
B
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Assertion (A): The DNA has two complementary strands. Reason (R): Adenine always pairs with thymine and guanine with cytosine.

In DNA, adenine paris with

Assertion : The two strands in DNA are complementary. Reason : Cytosine always pasirs with guanine and thymine with adenine.

Read the below Statements about the structure of genetic material and identify the correct ones. I. Adenine and guanine are bases that have a double ring structure , cytosine, thymine and uracil are based with a single ring structure . II. An adenine nucleotide from DNA is the same as an adenine nucleotide from RNA , DNA adenine pairs with uracil and RNA adenine pairs with thymine. III. The base pairing that occurs in a double DNA helix and when RNA is synthesised during transcription follows the rule that a purine pairs with a pyrimidine. IV. The two Polynucleotides on a DNA molecule run in opposite directions so that the double helix formed has two strands that are parallel to each other.

Assertion :- Constnt diameter of DNA double helix is 20Å Reason : Purines always pair with pyrimidines and vice-versa

Adenine is

In DNA, guanine pairs with :