Unit 3

Question 1

Genetic code has 64 codons while there are only 20 amino acids. Some amino acids are coded for by more than one codon. The genetic code is said to be?

Answer 1

Degenerate

Question 2

First nucleotide of

Answer 2

Third

Question 3

Contains codons

Answer 3

mRNA

Question 4

Termination of translation

Answer 4

Stop codon reached

Question 5

Initiation codon

Answer 5

5’ AUG 3’

Question 6

Mechanical changes that ribosomes undergo are driven by

Answer 6

GTP hydrolysis

Question 7

Enzyme that attaches appropriate amino acid to tRNA

Answer 7

Amino acyl tRNA sythetase

Question 8

Facilitates small 30s subunit to mRNA

Answer 8

IF1

Question 9

RNA polymerase I transcribes

Answer 9

rRNA genes

Question 10

SL1 in polymerase I recruits

Answer 10

RNA polymerase I to promoter

Question 11

UPF/UCE in poly I

Answer 11

Enhance transcription

Question 12

Triggers promoter escape

Answer 12

CKS of poly I phosphorylates RRN3 at serine in CTD

Question 13

Consequence of mutations in genes encoding factors involved in RNA polymerase I regulation

Answer 13

Dysregulated ribosome biogenesis