Midterm 2- Polymerases

Question 1

What does RNA Polymerase I transcribe?

Answer 1

• Pre r-RNA (28S, 18S, 5.8S, rRNAs).

- These pre r-RNAs are ribosomal components, and thus carry out protein synthesis

Question 2

What does RNA Polymerase II transcribe?

Answer 2

• mRNA, which encodes proteins
• snRNA, which participates in RNA splicing
• miRNA, which carries out post-translational gene control

Question 3

What does RNA Polymerase III transcribe?

Answer 3

• tRNA, which helps with protein synthesis
• SS rRNA, which are ribosomal components, and thus participate in protein synthesis
• snRNA U6, which participates in RNA splicing
• 75 RNA, which is a signal recognition particle for insertion of polypeptides into the endoplasmic reticulum
• Other stable short RNAs, which carry out various functions, most of which are unknown.
• 5s rRNA

Question 4

Pre r-RNA

Answer 4

• Ribosomal components

Question 5

mRNA

Answer 5

• Encodes proteins

Question 6

snRNA

Answer 6

• Participates in RNA splicing

Question 7

miRNA

Answer 7

• Carries out post-translational gene control

Question 8

tRNA

Answer 8

• Helps with protein synthesis

Question 9

SS rRNA

Answer 9

• Ribosomal components

Question 10

snRNA U6

Answer 10

-Participates in RNA splicing

Question 11

75 RNA

Answer 11

• Signal recognition particle for insertion of polypeptides into the endoplasmic reticulum