Answer: DNA damage (RecA coprotease activity).
- A Prolonged nutrient starvation activating the stringent response
- B DNA damage (RecA coprotease activity)
- C Exposure to high temperature alone, triggering heat-shock proteins
- D Osmotic stress activating compatible solute accumulation pathways
Correct answer: B. DNA damage (RecA coprotease activity)
Explanation: SOS response: DNA damage causes RecA to become activated as a coprotease. It cleaves LexA repressor, inducing DNA repair genes including RecA, UvrA, and error-prone polymerases.
Punnett square for a monohybrid cross between two heterozygous (Tt) parents, showing the 3:1 phenotypic ratio predicted by Mendel's Law of Segregation.
Concept context
Mendel's laws, inheritance patterns, DNA structure, and molecular biology. Core of NEET biology.
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