QUESTION 48) 1) A bacterial cell carrying a prophage is called a(n): A. merodiploid. B. virulent cell. C. lytic cell. D. lysogen. E. transformant. 1 points QUESTION 49 1. AP repair acts on nucleotides that are: A. located in a displacement loop. B. damaged by UV. C. missing the base. D. methylated. E. deaminated. 2 points QUESTION 50 1. If a particular mutation reverts at an unusually high rate, the cause of the mutation is very likely to be: A. a promoter malfunction. B. a pyrimidine dimer. C. a single base pair deletion. D. defect in the proofreading repair system. E. insertion of a transposable element.

The correct answer for question 48 is D.

The correct answer for question 49 is C.

The correct answer for question 50 is C.

Step-by-step explanation

A bacterial cell carrying a prophage is called a lysogen. A prophage is a bacteriophage genome inserted and integrated into a circular bacterial DNA chromosome or exists as an extrachromosomal plasmid. Phages are carried by lysogenic bacteria.

An AP site (apurinic/apyrimidinic site)/Abasic site, is a location in DNA and occasionally ion RNA that has neither a purine nor a pyrimidine base, either spontaneously or due to DNA damage. AP repair acts on nucleotides that lost their base o apurinic.

Mutations that reverts at unusually very high rate are due to single base pair deletion. Such mutations cause minor deleterious effects.