PYQ NEET- Biotechnology And Its Application

• 2019: The correct answer is (D).

Gene therapy involves introducing a normal gene into a cell to replace a mutated gene. Introduction of bacteria into a cell is not a part of gene therapy.

• 2018: The correct answer is (B).

Taq polymerase is a thermostable enzyme that can be used in polymerase chain reaction (PCR). PCR is a technique used in molecular biology to amplify a single copy of a DNA sequence.

• 2017: The correct answer is (C).

RNA interference (RNAi) is a process by which RNA molecules can inhibit gene expression. In RNAi, short interfering RNA (siRNA) molecules are introduced into the cell. siRNA molecules are complementary to mRNA molecules, and they can bind to mRNA molecules and inhibit their translation into proteins.

• 2016: The correct answer is (A).

Bt cotton is a genetically modified crop that is resistant to pests. Bt cotton was the first transgenic crop to be approved for commercial use.