Ch. 18: Protein Synthesis

Question 1

How many proteins are in the 50S large ribosomal subunit?

Answer 1

36

Question 2

How many proteins are in the 30S small ribosomal subunit?

Answer 2

21

Question 3

Which RNA’s are included in the 50S large ribosomal subunit?

Answer 3

5S and 23S

Question 4

Which RNA’s are included in the 30S large ribosomal subunit?

Answer 4

16S and others

Question 5

Which RNA polymerase makes the 18S, 28S, and 5.8S subunits?

Answer 5

Pol 1

This polymerase first makes a large sequence that is cut into the three smaller sequences

Question 6

Which RNA polymerase makes the 5S subunit (the fourth rRNA)?

Answer 6

Pol 3

Question 7

How many different aminoacyl-tRNA synthetases are present in the cell?

Answer 7

20, one for each amino acid

Question 8

Where do spliceosomes sit?

Answer 8

Spliceosome sits on the C-terminus end of DNA Pol 2

Question 9

What start tRNA is recruited in Prokaryotes?

Answer 9

fMet (formal Methionine, which finds the AUG sequence in the P-site)

Question 10

What does IRES stand for?

Answer 10

Internal Ribosome Entry Site–This allows the ribosome to bypass some of the initiation sequences (Shine Delgarno sequence). AUG is still needed