Initiation @ Termination

Question 1

What is the S value for prokaryotic ribosomes?

Answer 1

70S

Question 2

What are the sub units of eukaryotic ribosomes?

Answer 2

40S and 60S

Question 3

What are the sub units of prokaryotic ribosomes?

Answer 3

30S and 50S

Question 4

Prokaryotic initiation code for ribosomes?

Answer 4

AGGAGG

Question 5

What is the start code?

Answer 5

AUG

Question 6

What does AUG code for in prokaryotes?

Answer 6

N-formyl-methionyl-tRNA

Question 7

What does the P site hold?

Answer 7

tRNA with growing chain

Question 8

What does the A site hold?

Answer 8

tRNA with new amino acid

Question 9

What catalysed the exchange of the peptide chain to the new tRNA?

Answer 9

peptidyl transferase

Question 10

What direction is the polypeptide chain synthesised?

Answer 10

N>C

Question 11

What is wobble theory?

Answer 11

the anticodon of the tRNA in the A site can bind to multiple codons

Question 12

What is the kozak sequence?

Answer 12

The sequence around AUG in eukaryotes which attracts ribosomes

Question 13

What are the stop codons?

Answer 13

UAA UAG UGA

Question 14

What do the stop codons code for?

Answer 14

Release factors

Question 15

What does RF1 do?

Answer 15

recognises UAA UAG

Question 16

What does RF2 do?

Answer 16

Recognised UAA UGA

Question 17

What does RF3 do?

Answer 17

Terminates RF1 and RF2