Watson and Crick proposed the model for the 3D structure of DNA. Within this model: Group of answer choicesthe distance between the two strands of DNA is 4 nm.the two strands of DNA are held together by covalent bonds.the two strands of DNA run in the same 5’ → 3’ direction.ten bases are found in each turn of the helix.
Question
Watson and Crick proposed the model for the 3D structure of DNA. Within this model: Group of answer choicesthe distance between the two strands of DNA is 4 nm.the two strands of DNA are held together by covalent bonds.the two strands of DNA run in the same 5’ → 3’ direction.ten bases are found in each turn of the helix.
Solution
The correct answer is "ten bases are found in each turn of the helix."
Here's why:
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The distance between the two strands of DNA is not 4 nm. In the Watson-Crick model of DNA, the distance between the two strands of DNA is approximately 2 nm.
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The two strands of DNA are not held together by covalent bonds. Instead, they are held together by hydrogen bonds.
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The two strands of DNA do not run in the same 5’ → 3’ direction. They run in opposite directions, which is referred to as antiparallel orientation.
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Ten bases are found in each turn of the helix. This is correct. In the Watson-Crick model of DNA, there are approximately 10 base pairs per turn of the helix.
Similar Questions
What is the structure of the DNA double helix
The double helix structure of DNA is like a twisted ladder that is held together by the "rungs". Each rung consists of:a single basea pair of bases linked togethera proteina pair of atoms linked together
Describe the structure of DNA and the possible base pairs it contains.
In the Watson-Crick model for the DNA double helix, which of the following is true?Group of answer choicesThe DNA strands are anti-parallelThe strands are held together by peptide bondsThe strands are held together by ionic bondsThe DNA strands are parallel
How does the structure of DNA identified by Watson and Crick differ from the model previously proposed by Linus Pauling and others?
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