RNA types / Polymerases / Regions

Question 1

What RNAs can catalyze biochemical reactions?

Answer 1

Ribozymes

Question 2

Which type of RNAs are intermediates between DNA and protein?

Answer 2

Messenger - mRNAs

Question 3

What are the functional RNAs? (7)

Answer 3

tRNAs
rRNAs
snRNAs
miRNAs
siRNAs ^ piRNAs
lncRNAs

Question 4

Transfer RNAs :

Answer 4

Bring the correct amino acid to mRNAs during translation

Question 5

Ribosomal RNAs

Answer 5

Components of ribosomes that guide the assembly of amino acid chains

Question 6

Small nuclear RNAs:
snRNAs

Answer 6

Play a role in processing of RNA transcripts

Question 7

Micro RNAs:
miRNAs

Answer 7

Play a role in regulating transcript levels and translation

Question 8

Small interfering RNAs and piwi-interacting RNAs
siRNAs & piRNAs

Answer 8

Inhibit viruses and transposons, and may serve other functions

Question 9

Long noncoding RNAs
lncRNAs

Answer 9

Not well understood

Question 10

What does DNA pol I do?

Answer 10

Catalyzes growth 5’ to 3’
Removes mismatched bases 3’ to 5’
Degrades single strands 5’ to 3’

Question 11

What does DNA pol III do?
What does DNA pol I do after?
DNA ligase after?

Answer 11

After primase lays down primers, DNA pol III elongates them.
DNA pol I will degrade the primers and fill in the gaps
DNA ligase seals the nicks where primers used to be

Question 12

How many RNA pols do eukaryotes have?

Answer 12

3

Question 13

What does RNA pol I transcribe?

Answer 13

All dRNAs except 5s

Question 14

What does RNA pol II transcribe?

Answer 14

All mRNA

Question 15

What does RNA pol III transcribe?

Answer 15

tRNAs
5s rRNA
and other small RNAs