XV

Question 1

Nucleotides are composed of?

Answer 1

Sugar, nitrogenous base, and phosphate

Question 2

The purines are?

Answer 2

Double ringed, A and G

Question 3

The pyramidines are?

Answer 3

Single ringed, C, T, and U

Question 4

Prokaryotic transcription is regulated by?

Answer 4

The operon

Question 5

Structural genes are?

Answer 5

DNA codes for protein

Question 6

An operator gene is?

Answer 6

A repressor binding site

Question 7

RNA poly’s first binding site is?

Answer 7

Promoter gene

Question 8

Inducible systems need?

Answer 8

An inducer for transcription to occur

Question 9

Repressible systems need?

Answer 9

A corepressor to inhibit transcription

Question 10

A point mutation is?

Answer 10

One nucleotide is substituted for another

Question 11

Point mutations are silent if?

Answer 11

Amino acid sequence doesn’t change

Question 12

Frameshift mutations are?

Answer 12

Insertions or relations that shift reading frame

Question 13

The consequences of frame shift mutations are?

Answer 13

Protein doesn’t form or is nonfunctional.

Question 14

Virus genetic material can be?

Answer 14

Double or single stranded DNA or RNA

Question 15

The lytic cycle of viruses:

Answer 15

Virus kills host

Question 16

The lysogenic cycle of viruses?

Answer 16

Virus enters host genome

Question 17

Semiconservative DNA replication means?

Answer 17

Each new helix has a strand from parent helix.

Question 18

In eukaryotic transcription, RNA poly does what?

Answer 18

Synthesizes hnRNA using a DNA antisense strand as a template.

Question 19

What happens to introns in post transcriptional processing?

Answer 19

The are cut out of hnRNA

Question 20

What happens to exons in post transcriptional processing?

Answer 20

They are spliced to form mRNA.

Question 21

Where exactly does translation occur?

Answer 21

On ribosomes in the cytoplasm.

Question 22

What type of bonds are made during post translational processing?

Answer 22

Disulfide

Question 23

What happens during post translational processing?

Answer 23

Bonds are made before the polypeptide becomes a functional protein.