Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2020ZoologyMolecular Basis of InheritanceActual

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 × 10 9 bp bp, then the length of the DNA is approximately

Options

  1. A2 . 5 meters
  2. B2 . 2 meters
  3. C2 . 7 meters
  4. D2 . 0 meters

Correct answer

B. 2 . 2 meters

Step-by-step solution

Given the distance between two consecutive base pairs is 0 . 34   nm = 0 . 34 × 10 - 9   m . A total number of bases = 6 . 6 × 10 9   bp . Length of DNA = Total no. of bp × Distance between two consecutive bp =   6 . 6 × 10 9 × 0 . 34 × 10 - 9 = 2 . 24   m

Practice Molecular Basis of Inheritance on Quantrex Academy →

More from Molecular Basis of Inheritance

Which of the following statements about lac-operon is correct ? 2026Which of the following enzymes synthesizes precursor mRNA ? 2026Which of the following statements are correct with reference to a transcription unit ? A. A transcription unit in DNA is defined primarily by three regions : promoter, structural g 2026Which of the following statements are correct with reference to packaging of DNA helix ? A. Histones are organized to form a unit of eight molecules called histone octamer. B. Hist 2026Arrange the following steps of DNA fingerprinting in a correct sequence. A. Isolation of DNA and its digestion by restriction endonucleases. B. Hybridisation using a labelled VNTR 2026In the lac operon, the z gene codes for : 2026Given below are two statements : Statement I : In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic m 2025Match List I with List II: array |l|l|l|l| & List - I & & List - II A . & Alfred Hershey and Martha Chase & (i) & Streptococcus pneumoniae B. & Euchromatin & (ii) & Densely packed 2025 Full Molecular Basis of Inheritance list All NEET PYQs