Microbiology Demystified

(c) They increase gene expression.

(d) They stop the initiation of transcription.

9. An operon consists of structural genes, regulatory genes, and control
   genes.
   (a) True
   (b) False


10. Spontaneous mutation occurs as a result of laboratory intervention in
    DNA replication.
    (a) True
    (b) False

CHAPTER 7 Microbial Genetics^129