If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is - Biology MCQ NEET 2020 E1 2026 | ExamTest.live

hardMCQNEET 2020 E12026Biology

1 mark

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 \times 1 0^{9} bp, then the length of the DNA is approximately:

Solution & Step-by-step Explanation

Length of DNA = Total number of bp \times distance between two consecutive bp. Length = (6.6 \times 1 0^{9} bp) \times (0.34 \times 1 0^{- 9} m/bp) Length \approx 6.6 \times 0.34 m Length \approx 2.244 m \approx 2.2 meters

Try it yourself before checking the explanation above.

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 \times 1 0^{9} bp, then the length of the DNA is approximately:

2.0 meters

2.5 meters

2.2 meters

2.7 meters

Practice with timed mock tests and track your performance across Biology.