control of gene expression Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

what is a transcription factor?

A

proteins that affect the rate of transcription

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what does post-translational control involve?

A

modifications to proteins that have been synthesized e.g…

-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what does the regulatory gene code for?

A

regulatory protein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what do the structural genes do in lac operon?

A

code for enzyme lactase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what does the repressor protein do?

A

prevents transcription of structural genes if lactose is not present by preventing RNA polymerase binding to DNA (the promoter) triggering transcription

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is an operon?

A

a group of genes under the control of the same regulatory mechanism

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is the advantage of an operon?

A

save resources,, if certain gene products are not needed then the genes for the production of the product are switched off`

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what happens in the lac operon if lactose is present?

A

lactose binds to repressor protein causing change in shape so it cant bind to the operator

results in RNA polymerase being able to bind to the promoter, three structural genes transcribed and enzymes are synthesized

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is the section of DNA that is the binding site for RNA polymerase called?

A

the promoter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is produced after transcription?

A

pre-mRNA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is the non-coding part of DNA called?

A

introns

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the coding part of DNA called?

A

exons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is bioinformatics?

A

development of software/computing tools (algorithms, mathematical models, statistical tests) to organise and analyse vast quantities of raw biological data

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is computational biology?

A

using the data to build theoretical models of biological systems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is synthetic biology?

A

an emerging area of research that can be broadly described as the design and construction of novel artificial biological pathways, organisms or devices, or the redesign of existing natural biological systems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

how has gene sequencing allowed for
genome-wide comparisons between
individuals and between species to be made?

A

Understanding Disease and Traits: Differences in genomes can be linked to phenotypic traits e.g. disease susceptibility/response to treatments

Personalized Medicine: genome sequencing enable tailored treatments based on individual genetics

17
Q

how has gene sequencing allowed for the development of synthetic biology?

A
18
Q

what are some examples of synthetic biology?

A

synthesizing new genes to replace faulty ones, genetic engineering, synthesizing new organisms

19
Q

how has gene sequencing allowed for the sequences of amino acids in polypeptides to be predicted?

A
20
Q
A