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One turn of the DNA double helix spans a distance of
- a)3.4 nm
- b)4.26 nm
- c)4.56 nm
- d)2.46 nm
Correct answer is option 'A'. Can you explain this answer?
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One turn of the DNA double helix spans a distance ofa)3.4 nmb)4.26 nmc...
Length of one turn of the DNA double helix
DNA double helix is a structure composed of two strands that coil around each other. The length of one turn of the DNA double helix is an important characteristic of the DNA molecule.
Answer: 3.4 nm
The correct answer is option 'A', which is 3.4 nm. This distance represents the length of one complete turn of the DNA double helix.
Explanation
- Structure of DNA: DNA is made up of nucleotides that are arranged in a double helix structure. The two strands are connected by hydrogen bonds between complementary base pairs.
- Base pairs: Adenine pairs with thymine, and guanine pairs with cytosine. These base pairs form the rungs of the DNA ladder.
- Distance per base pair: The distance between each base pair in the DNA double helix is approximately 0.34 nm.
- Calculating one turn: Since there are 10 base pairs per turn in the DNA double helix, the total distance for one complete turn can be calculated by multiplying the distance per base pair by the number of base pairs per turn.
- Calculation: 0.34 nm/base pair x 10 base pairs/turn = 3.4 nm/turn.
Therefore, the length of one turn of the DNA double helix is 3.4 nm. This measurement is crucial in understanding the structure and function of DNA in various biological processes.
DNA double helix is a structure composed of two strands that coil around each other. The length of one turn of the DNA double helix is an important characteristic of the DNA molecule.
Answer: 3.4 nm
The correct answer is option 'A', which is 3.4 nm. This distance represents the length of one complete turn of the DNA double helix.
Explanation
- Structure of DNA: DNA is made up of nucleotides that are arranged in a double helix structure. The two strands are connected by hydrogen bonds between complementary base pairs.
- Base pairs: Adenine pairs with thymine, and guanine pairs with cytosine. These base pairs form the rungs of the DNA ladder.
- Distance per base pair: The distance between each base pair in the DNA double helix is approximately 0.34 nm.
- Calculating one turn: Since there are 10 base pairs per turn in the DNA double helix, the total distance for one complete turn can be calculated by multiplying the distance per base pair by the number of base pairs per turn.
- Calculation: 0.34 nm/base pair x 10 base pairs/turn = 3.4 nm/turn.
Therefore, the length of one turn of the DNA double helix is 3.4 nm. This measurement is crucial in understanding the structure and function of DNA in various biological processes.
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One turn of the DNA double helix spans a distance ofa)3.4 nmb)4.26 nmc)4.56 nmd)2.46 nmCorrect answer is option 'A'. Can you explain this answer?
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