lecture 25

Question 1

where does translation occur in eukaryotes?

Answer 1

cytoplasm

Question 2

when does translation occur?

Answer 2

during G1 or G2; when organelles are being synthesized

Question 3

what is the 60S ribosome?

Answer 3

the large subunit that joins amino acids into peptide chains

Question 4

what is the 40S ribosome?

Answer 4

the small subunit that reads the mRNA

Question 5

to which site on the ribosome does the tRNA bind?

Answer 5

A site

Question 6

what configuration does a tRNA molecule have?

Answer 6

cloverleaf with an anticodon arm at one end and two arms on either side

Question 7

what is the start codon?

Answer 7

AUG

Question 8

what are the stop codons?

Answer 8

UGA, UAA, UAG

Question 9

what are the four steps of translation?

Answer 9

activation, initiation, elongation, termination

Question 10

during which stage of translation do RNAs bring the correct amino acid to the ribosome to build polypeptide chains?

Answer 10

activation

Question 11

what does the 40S ribosome look for to bind with the mRNA?

Answer 11

5’ cap

Question 12

what type of bond forms between the amino acids at the P and A sites?

Answer 12

peptide bond

Question 13

what is the tRNA for the stop codon?

Answer 13

there are NO tRNAs for stop codons