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What is the length of the DNA double helix, if the total number of bp (base pair) is 6.6 x 109?
  • a)
    2.2 m
  • b)
    2.5 m/bp
  • c)
    2.2 m/bp
  • d)
    2.5 m
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
What is the length of the DNA double helix, if the total number of bp ...
  • The distance between 2 consecutive bp is 0.34 nm. The formula to calculate the length of the DNA double helix:
  • The length of the DNA double helix = The total number of bp x distance between two consecutive bp.
  • As a result, we get 2.2 m as the length of the DNA double helix.
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Most Upvoted Answer
What is the length of the DNA double helix, if the total number of bp ...
Understanding DNA Length Calculation
To determine the length of a DNA double helix based on the number of base pairs (bp), we need to know the average length of DNA per base pair.
Average Length of One Base Pair
- Each base pair in DNA is approximately 0.34 nanometers (nm) long.
- 1 nm = 1 x 10^-9 meters.
Total Base Pairs
- Given total number of base pairs (bp) = 6.6 x 10^9 bp.
Calculating Total Length
1. Convert Base Pairs to Meters:
- Total length in meters = Number of base pairs × Length of one base pair.
- Total length = 6.6 x 10^9 bp × 0.34 nm.
2. Convert 0.34 nm to meters:
- 0.34 nm = 0.34 x 10^-9 m = 3.4 x 10^-10 m.
3. Performing the Calculation:
- Total length = 6.6 x 10^9 bp × 3.4 x 10^-10 m/bp.
- Total length = 2.244 x 10^0 m.
- This simplifies to approximately 2.2 m.
Conclusion
Thus, the length of the DNA double helix with 6.6 x 10^9 base pairs is approximately 2.2 meters. Hence, the correct answer is option 'A'.
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