Question

Choose the incorrect statement for the central portion of the lambda genome.

(a) The central portion is not required for lytic growth

(b) The central portion includes repressor gene

(c) The repressor gene is not required for lysogenic growth

(d) It is approximately 10kbp long

This question was addressed to me in my homework.

This interesting question is from Cloning in Lambda topic in chapter Other Vector Systems for E of Genetic Engineering

Answer 1

The correct choice is (d) It is approximately 10kbp long

For explanation: The central portion of the lambda genome is approximately 20 kbp and it is not required for lytic growth. The central portion constitutes of repressor gene and thus it has to be removed for the lysogenic growth to take place.