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In which of the following, the linking number (Lk) of a closed-circular double-stranded DNA molecule remains same?
  • a)
    Breaking a strand, unwinding or rewinding the DNA, then rejoining it.
  • b)
    Breaking all hydrogen bonds in the DNA and cleavage of phosphodiester bond.
  • c)
    Supercoiling without the breaking of any phosphodiester bonds.
  • d)
    None of the above
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
In which of the following, the linking number (Lk) of a closed-circula...
The Linking number (Lk) is the number of times the axis of a DNA molecule crosses itself around the central axis. Lk determines the degree of supercoiling. The linking number of DNA molecule cannot change until the two strands are covalently intact. It can only be changed by breaking and rejoining of strands.
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In which of the following, the linking number (Lk) of a closed-circular double-stranded DNA molecule remains same?a)Breaking a strand, unwinding or rewinding the DNA, then rejoining it.b)Breaking all hydrogen bonds in the DNA and cleavage of phosphodiester bond.c)Supercoiling without the breaking of any phosphodiester bonds.d)None of the aboveCorrect answer is option 'C'. Can you explain this answer?
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In which of the following, the linking number (Lk) of a closed-circular double-stranded DNA molecule remains same?a)Breaking a strand, unwinding or rewinding the DNA, then rejoining it.b)Breaking all hydrogen bonds in the DNA and cleavage of phosphodiester bond.c)Supercoiling without the breaking of any phosphodiester bonds.d)None of the aboveCorrect answer is option 'C'. Can you explain this answer? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about In which of the following, the linking number (Lk) of a closed-circular double-stranded DNA molecule remains same?a)Breaking a strand, unwinding or rewinding the DNA, then rejoining it.b)Breaking all hydrogen bonds in the DNA and cleavage of phosphodiester bond.c)Supercoiling without the breaking of any phosphodiester bonds.d)None of the aboveCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In which of the following, the linking number (Lk) of a closed-circular double-stranded DNA molecule remains same?a)Breaking a strand, unwinding or rewinding the DNA, then rejoining it.b)Breaking all hydrogen bonds in the DNA and cleavage of phosphodiester bond.c)Supercoiling without the breaking of any phosphodiester bonds.d)None of the aboveCorrect answer is option 'C'. Can you explain this answer?.
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