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Molecular Basis of Inheritance question

2006 · Q73
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Molecular Basis of Inheritance question

2006 · Q73

NEETBiologyMolecular Basis of InheritanceMCQ+4 / −1
Antiparallel strands of a DNA molecule means that-
  1. A
    The phosphate groups at the start of two DNA strands are in opposite position (pole)
  2. B
    One strand turns anti-clockwise
  3. C
    One strand turns clockwise
  4. D
    The phosphate groups of two DNA stands, at their ends, share the same position
View written solutionFree

Correct answer: A

Griffith’s experiment with Pneumococcus proves that DNA is the genetic material. It consists of a long polymer of nucleotides which transcribes the coded information in the form of a triplet code of nucleotides in mRNA. It is a double helical molecule. The two strands of DNA run in opposite directions to one another with the hydrogen bonds between them. One strand of DNA has 5'-3' direction and the other strand has 3'-5' direction. So they are antiparallel. This direction is determined by the presence of a free phosphate or OH group at the end of the strand.

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