- A Flagellar proteins used for bacterial movement
- B Cry proteins encoded by cry genes
- C Capsular polysaccharides forming a protective layer
- D Endospore coat proteins protecting the dormant spore
Correct answer: B. Cry proteins encoded by cry genes
Explanation: Cry proteins (also called delta endotoxins or crystalline proteins) encoded by cry genes are the insecticidal components of Bacillus thuringiensis that kill caterpillars and other insect larvae.
Concept context
Microorganisms in food, medicine, sewage treatment, biocontrol, and biofertilizers