Fundamentals Of Microbiology 10th Edition by Jeffrey Pommerville

Exercise 23

How do chemical mutagens interfere with DNA replication or gene expression
b. Justify the statement: "A base-pair deletion (or insertion) potentially is more dangerous to an organism's viability than a base-pair substitution."
c. Explain why cells need at least two repair mechanisms (mismatch and excision).
d. What harm or benefit is conferred by insertion sequences and transposons