Block 3 - Lec 35 - Regulating RNA Synthesis

Question 1

decreased transcription of an RNA that has already initiated transcription;
the decrease results from modulation of termination.

Answer 1

attenuation

Question 2

a gene that encodes the amino acid sequence of a polypeptide. Often
equivalent to a cistron.

Answer 2

structural gene

Question 3

a protein that binds to DNA to increase the transcription of a gene or group of
related genes.

Answer 3

activator

Question 4

a small molecule that causes induction, often by binding a repressor.

Answer 4

inducer

Question 5

a DNA region which regulates transcription of adjacent gene(s). An operator
is a regulatory gene.

Answer 5

operator

Question 6

genes of diauxy were mapped into the blank operon

Answer 6

lac

Question 7

time during exponential multiplying of growth in diauxy that uses glucose

Answer 7

first log phase

Question 8

second log phase in diauxy was due to the use of blank as a fuel

Answer 8

lactose

Question 9

lac operon consists of a blank and blank genes

Answer 9

promoter, structural

Question 10

lac operon showed blank which broke lactose into glucose and galactose

Answer 10

beta galactose

Question 11

in the lac operon, this transports lactose into cell

Answer 11

permease

Question 12

gene that turns off transcription

Answer 12

repressor

Question 13

messenger RNA that can encode more than one polypeptide separately within the same RNA molecule

Answer 13

polycistronic

Question 14

the model of how a lac operon works

Answer 14

double negative

Question 15

the amount of galactosidase fits the blank and growth condition (big table of nonsense)

Answer 15

genotype

Question 16

lac activation goes along with catbolite blank

Answer 16

repression

Question 17

the blank protein acts positively and turns out to be a dimer to bind the symmetrical dna sequence

Answer 17

CRP

Question 18

CRP and repressor are blank proteins and bind to blank in DNA

Answer 18

symmetrical, palindromes

Question 19

repression and attenuation uses the blank operon

Answer 19

trp

Question 20

repression is the single blank compared to inductions blank

Answer 20

single negative, double negative

Question 21

trp operon has blank starting before blank ends

Answer 21

translation, transcription

Question 22

trp operon is for blank control

Answer 22

volume

Question 23

high levels of tryptophan causes transcription to blank

Answer 23

not even start

Question 24

low levels of tryptophan causes transcription to blank

Answer 24

start and keep going

Question 25

moderate levels of tryptophan causes transcription to blank

Answer 25

start and then stop halfway through

Question 26

eukaryotes have blank mRNA unlike prokaryotes that have blank mRNA

Answer 26

monocistronic, polycistronic

Question 27

eukaryotes have blank mRNA unlike prokaryotes that have blank mRNA

Answer 27

stable, unstable