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Question

The pitch of the DNA helix is:

A

36 degrees

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B

360 degrees

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C

3.4 Angstrom

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D

34 Angstrom

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Solution

The correct option is D

34 Angstrom


Watson and Crick proposed the famous double helix model for the structure of DNA.

DNA is made up of two strands which are coiled in a right-handed fashion.

The two strands of DNA are antiparallel and complementary to each other.

Each turn of the DNA helix is called the pitch, and it is about 34 Angstrom or 3.4 nm in length and approximately has 10 base pairs.


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