Same chapter3 marksDifficulty: Medium
What is the lac operon, and how is it regulated?
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3 marksDifficulty: Medium
State Chargaff's rules and what they told Watson and Crick.
Original Khojo Papers practice question — not from a past board paper.
Answer
In any double-stranded DNA the amount of adenine equals the amount of thymine and the amount of guanine equals the amount of cytosine, so purines equal pyrimidines. The rules pointed directly to specific base pairing between A and T and between G and C, which is the key to the double helix.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The rules do not hold for single-stranded nucleic acids.
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