Question

COX3 gene is a selectable marker. Choose the correct statement with respect to it.

(a) It confers the ability to grow by anaerobic respiration

(b) It confers the ability to grow by aerobic respiration

(c) It confers the ability to grow in absence of uracil

(d) It confers the ability to grow in lithium acetate medium

The question was asked during an online interview.

My question is from Organelle Transformation in division Using Other Organisms of Genetic Engineering

Answer 1

Correct answer is (b) It confers the ability to grow by aerobic respiration

The best explanation: COX3 gene is used as a selectable marker. It confers the ability to grow by aerobic respiration in the mutant cells for mitochondrial COX3 gene.