Genetics Exam 4

Question 1

constitutive genes

Answer 1

genes that are always on

Question 2

regulated genes

Answer 2

are turned on and off due to response to environment

Question 3

Cis-acting elements

Answer 3

dna sequence upstream of the start site, basal promoter and regulatory promoter regions, consensus region

Question 4

what is important about the basal promoter and regulatory promoter regions?

Answer 4

they give specificity and enhanced levels

Question 5

what is important about the consensus region?

Answer 5

it is needed for identification

Question 6

trans-acting elements

Answer 6

proteins that are transcription factors, that bind to DNA elements, can also be hormones or small peptides

Question 7

what are operons important

Answer 7

because they are needed for gene regulation in bacteria for functionally related proteins to be coded for within the genes

Question 8

inducible

Answer 8

operon is off but can be turned on

Question 9

repressible

Answer 9

the operon is on but can be turned off

Question 10

positive operon

Answer 10

activator is used

Question 11

negative operon

Answer 11

repressor is used