gene regulation 2E

Question 1

gene regulation

Answer 1

the control of gene expression

Question 2

structural gene

Answer 2

segment of DNA that codes for proteins that play a role in the structure or function of a cell or organism

Question 3

regulatory gene

Answer 3

a segment of DNA responsible for producing proteins that control the expression of genes.

Question 4

repressor protein

Answer 4

a protein coded by regulatory gene that prevents gene expression by binding to its operator

Question 5

activator protein

Answer 5

protein coded by the regulatory gene that increases gene expression

Question 6

operon

Answer 6

cluster of linked genes that all share a common promotor and operator and transcribed at the same time

Question 7

trp operon

Answer 7

a series of genes within a certain species of bacteria that encodes for the production of the amino acid tryptophan

Question 8

conformational change

Answer 8

change in 3D shape of macromolecules such as protein

Question 9

trp operon repression

Answer 9

mechanism for gene regulation where the repressor protein stop the initiation of transcription when tryptophan levels are high

Question 10

trp operon attenuation

Answer 10

mechanism for gene regulation where the premature ceasing of translation stop transcription when tryptophan levels are high

Question 11

leader region

Answer 11

segment of DNA or mRNA that immediately precedes the coding region

Question 12

attenuator sequence

Answer 12

part of leader region that allows attenuation

Question 13

terminator hairpin loop

Answer 13

loop formed in mRNA in the presence of tryptophan- doesn’t allow transcription of structural gene (3/4)

Question 14

anti terminator hair pin loop

Answer 14

loop formed in mRNA when tryptophan is not present. allows transcription of structural gene (2/3)