Question

True or False
(With Explanation)

According to the double helix model, the nitrogen
bases are projected more or less perpendicular
to backbone but face outside.

Answer 1

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Here is your answer

true

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Answer 2

Answer:

The answer is false.

Explanation:

• The statement, According to the double-helix model, the nitrogen bases are projected more or less perpendicular to the backbone but the face outside is false.
• The nitrogen bases are projected more or less perpendicular to the sugar-phosphate backbone but they do not face outside, they face inside.
• The base-pairing in the double helix model is specific. Adenine molecule is always paired with thymine molecule with the help of two bonds that are hydrogen bonds.
• The molecule guanine is always paired with a cytosine molecule with triple hydrogen bonds.
• Thus, all base pairs in DNA molecules consist of one purine and one pyrimidine.
• Therefore, the given statement is false.