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Question
Read the passage carefully and answer the question given below.
In 1953, based on the data given by Maurice Wilkins and Rosalind Franklin, the famous double helix structure of DNA was proposed by James Watson and Francis Crick.
The pitch of the DNA double helix is ___________.
[1 mark]
Read the passage carefully and answer the question given below.
In 1953, based on the data given by Maurice Wilkins and Rosalind Franklin, the famous double helix structure of DNA was proposed by James Watson and Francis Crick.
The pitch of the DNA double helix is ___________.
[1 mark]
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Solution
The correct option is B 3.4 nanometer
The pitch of the DNA double helix refers to the length of one complete turn of the helix. It is 3.4 nanometer (3.4 nm or 34Å) according to the Watson and Crick model of DNA structure. There are ten bases per pitch in one strand. Hence option b is correct.
Figure : Pitch of the DNA double helix
The pitch of the DNA double helix refers to the length of one complete turn of the helix. It is 3.4 nanometer (3.4 nm or 34Å) according to the Watson and Crick model of DNA structure. There are ten bases per pitch in one strand. Hence option b is correct.
Figure : Pitch of the DNA double helixSuggest Corrections
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