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How many base pairs would be found in a B-DNA double helix that is 170A long?
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How many base pairs would be found in a B-DNA double helix that is 170...
Calculating the Number of Base Pairs in a B-DNA Double Helix
When determining the number of base pairs in a B-DNA double helix that is 170A long, we need to consider the structure of DNA and its dimensions.

Length of Each Turn of the Helix
- In B-DNA, each turn of the helix measures approximately 34 angstroms (A).
- This means that for every turn, there are 10 base pairs (since each base pair contributes about 3.4A to the length).

Calculating the Number of Turns
- To find the number of turns in a 170A long double helix, we divide the total length by the length of each turn: 170A / 34A = 5 turns.

Calculating the Number of Base Pairs
- With 10 base pairs per turn, we multiply the number of turns by 10: 5 turns * 10 base pairs/turn = 50 base pairs.
Therefore, a B-DNA double helix that is 170A long would contain 50 base pairs. This calculation is based on the regular dimensions of B-DNA and the relationship between helical turns and base pairs.
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How many base pairs would be found in a B-DNA double helix that is 170...
50 bp
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How many base pairs would be found in a B-DNA double helix that is 170A long?
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