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Flashcards in XV Deck (23):
1

Nucleotides are composed of?

Sugar, nitrogenous base, and phosphate

2

The purines are?

Double ringed, A and G

3

The pyramidines are?

Single ringed, C, T, and U

4

Prokaryotic transcription is regulated by?

The operon

5

Structural genes are?

DNA codes for protein

6

An operator gene is?

A repressor binding site

7

RNA poly's first binding site is?

Promoter gene

8

Inducible systems need?

An inducer for transcription to occur

9

Repressible systems need?

A corepressor to inhibit transcription

10

A point mutation is?

One nucleotide is substituted for another

11

Point mutations are silent if?

Amino acid sequence doesn't change

12

Frameshift mutations are?

Insertions or relations that shift reading frame

13

The consequences of frame shift mutations are?

Protein doesn't form or is nonfunctional.

14

Virus genetic material can be?

Double or single stranded DNA or RNA

15

The lytic cycle of viruses:

Virus kills host

16

The lysogenic cycle of viruses?

Virus enters host genome

17

Semiconservative DNA replication means?

Each new helix has a strand from parent helix.

18

In eukaryotic transcription, RNA poly does what?

Synthesizes hnRNA using a DNA antisense strand as a template.

19

What happens to introns in post transcriptional processing?

The are cut out of hnRNA

20

What happens to exons in post transcriptional processing?

They are spliced to form mRNA.

21

Where exactly does translation occur?

On ribosomes in the cytoplasm.

22

What type of bonds are made during post translational processing?

Disulfide

23

What happens during post translational processing?

Bonds are made before the polypeptide becomes a functional protein.