Practice question

MCQ

Question

With reference to lac operon which one of the following merodiploids will show a constitutive expression of β-galactosidase?

Options

Choose one · Correct answer highlighted

I-O+Z+Y-/ F' I+ O+Z-Y+ I-OCZ+Y- / F' I+O+Z-Y+ Correct I-O+Z+Y- / F' I+OCZ-Y+ I-OCZ-Y- / F' I+O+Z+Y+

Explanation

Mechanistically, nucleic acid structure and recombination involves hairpin formation, Holliday junction resolution and translation control ensure fidelity. This validates I-OCZ+Y- / F' I+O+Z-Y+ because it matches molecular mechanisms, a pattern repeatedly demonstrated in molecular biology research.

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