Powerpoint 29

Question 1

the information from the DNA that we need to adapt to our life right now

Answer 1

mRNA

Question 2

the translator for the ribosome liks specific sequences to amino-acids

Answer 2

tRNA

Question 3

RNA parts of the protein making machine

-16S a critical feature

Answer 3

rRNA

Question 4

bacterial genes are organized into

Answer 4

operons

Question 5

grouping of genes allow concerted

Answer 5

transcription and translation

Question 6

generated a polycistronic message of multiple genes required for

Answer 6

function

Question 7

constantly synthesized

-enzymes of glycolysis

Answer 7

constitutive

Question 8

not trgulartly produced

• turned on in certain conditions
• B-galactosidase

Answer 8

Indicible

Question 9

routinely synthesizes

-generally involved in biosynthesis

Answer 9

Repressible

Question 10

mechanisms controlling transcription

Answer 10

regulatory region near promotor

Question 11

protein binds to regulatory region and acts as a

Answer 11

on/off switch

Question 12

Binding protein can act as a repressor or activator. A repressor

Answer 12

blocks transcription

Question 13

a activator

Answer 13

facilitates transcription

Question 14

the synthesis of a strand of mRNA from DNA template strand is synthesized by *RNA polymerase

Answer 14

Transcription

Question 15

Transcription initiation in prokaryotes occurs when a _____ binds the promoter orienting a RNA-polymerase

Answer 15

sigma factor

Question 16

recognizes elements in upstream region of DNA -35 and -10 to the start site

Answer 16

RNA polymerase “seeing eye dog”

Question 17

the third base is known as the

Answer 17

wobble base

Question 18

the usage of particular codons is different between different organisms, this is called

Answer 18

CODON BIAS of an organism

Question 19

is 4-8 base pairs before the first AUG. Also called the ribosome binding site

Answer 19

Shine-Dalgarno

Question 20

sequence is complementary to one in the 16s rRNA

Answer 20

Shine-Dalgarno

Question 21

form peptide bonds along the way while the robosome continues down the strand of mRNA

Answer 21

amino acids

Question 22

is terminated when the ribosome’s come to a stop or nonsense codon

Answer 22

Translation

Question 23

• at this point the ribosomes separate

- the new polypeptide chain is released

Answer 23

after translaion is terminated

-then the ribosome and the mRNa are free to begin translation again

Question 24

example of induction of gene expression

Answer 24

lac operon

Question 25

Near the operon on the DNA is a regulatory gene called the l gene -this codes for the repressor protein

Answer 25

Lac operon

Question 26

when lactose is absent the repressor protein binds to the

Answer 26

operator region

Question 27

the biding of the repressor gene prevents RNA polymerase from transcribing the structual genes so

Answer 27

No mRNA is made and no enzymes are synthesized

Question 28

when lactose is present the ___ binds to lactose instead of the operator and is released for DNA

Answer 28

repressor

Question 29

with the repressor bound to the lactose, RNA polymerase is able to bind to te promoter and transcribe the

Answer 29

structural gene

Question 30

acts as the induced by keeping the repressor from binding to the operator

Answer 30

Lactose

Question 31

is allows the transcription of the structural genes

Answer 31

Lactose