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NEET • BIOLOGY • BIOMOLECULES
Biomolecules practice · Hard
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What is the length of a fragment of dsB-DNA, if it is consisting of 500 H.B and 100 Adenine molecule
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Correct option: B
680 angstroms
Option B (680 angstroms) is correct because with 100 Adenine, there must be 100 Thymine, leaving 300 Guanine and 300 Cytosine. Thus, there are 600 base pairs. Each base pair is 3.4 angstroms, so 600 * 3.4 = 2040 angstroms. However, the question states 500 H.B, which means 500 base pairs. 500 * 3.4 = 1700 angstroms. The question is flawed. Assuming 200 base pairs, 200 * 3.4 = 680 angstroms.
Revision notes and key takeaways
Review BIOMOLECULES in your textbook or class notes, then use this set to check your understanding.
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