Question

The increase in the copy of a gene which expresses itself to release enzyme which breaks the pesticides into less toxic chemicals is a

• A. Parasitic mechanism
• B. Protective mechanism
• C. Negative feedback mechanism
• D. All of the above

Answer 1

Answer: (B)

Protective mechanism

• Protective mechanism is to increase the number of copies of a gene, allowing the organism to produce more protective enzymes.
• These protective enzymes have the capacity to break the pesticide into less toxic chemicals.
• As a result, the pests can become resistant by evolving physiological changes that protect them from the chemical.
• Such enzymes include esterases, glutathione transferases, and mixed microsomal oxidases.

So, the correct answer is option B.