CH 19

Question 1

Positive control

Answer 1

the product of a regulatory gene is required to initiate the expression of one or more genes

Question 2

Negative control

Answer 2

the product of a regulatory gene is required to turn of the expression of one or more genes

Question 3

multigenic

Answer 3

operons carrying more than one structural gene

Question 4

All structural genes in an operon are

Answer 4

co-transcribed and therefore are co-ordinately expressed

Question 5

feedback inhibition

Answer 5

when the product of a biosynthetic pathway inhibits the activity of the first enzyme in the pathway, rapidly shutting of the synthesis of the product