Flashcards in XV Deck (23):
Nucleotides are composed of?
Sugar, nitrogenous base, and phosphate
The purines are?
Double ringed, A and G
The pyramidines are?
Single ringed, C, T, and U
Prokaryotic transcription is regulated by?
Structural genes are?
DNA codes for protein
An operator gene is?
A repressor binding site
RNA poly's first binding site is?
Inducible systems need?
An inducer for transcription to occur
Repressible systems need?
A corepressor to inhibit transcription
A point mutation is?
One nucleotide is substituted for another
Point mutations are silent if?
Amino acid sequence doesn't change
Frameshift mutations are?
Insertions or relations that shift reading frame
The consequences of frame shift mutations are?
Protein doesn't form or is nonfunctional.
Virus genetic material can be?
Double or single stranded DNA or RNA
The lytic cycle of viruses:
Virus kills host
The lysogenic cycle of viruses?
Virus enters host genome
Semiconservative DNA replication means?
Each new helix has a strand from parent helix.
In eukaryotic transcription, RNA poly does what?
Synthesizes hnRNA using a DNA antisense strand as a template.
What happens to introns in post transcriptional processing?
The are cut out of hnRNA
What happens to exons in post transcriptional processing?
They are spliced to form mRNA.
Where exactly does translation occur?
On ribosomes in the cytoplasm.
What type of bonds are made during post translational processing?