Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

MCBG (Milly's) > Session 8 (Gene Expression) > Flashcards

Session 8 (Gene Expression) Flashcards

1
Q

What are the 3 stages of gene expression?

A

Initiation, elongation and termination

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

What does a transcription factor do?

A

Tells RNA polymerase to bind at specific points

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

What is initiation?

A

When RNA polymerase binds to DNA

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

What is elongation?

A

5’ to 3’ chain growth

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

What is formed during elongation?

A

A pre RNA molecule

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

What happens during transcription termination?

A

Termination sequence is reached, pre-RNA molecule=released

Cut by endonucleases

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

What are the 3 forms of RNA processing?

A

Capping, tailing, splicing

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

What is capping?

A

A 5’-5’ linkage which protects against degradation

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

What is tailing?

A

A polyA tail is added to the 3’ end- protects against degradation

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

What enzyme does the tailing?

A

PolyA polymerase

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

What is splicing?

A

Introns (different combinations of) being removed

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

How much + how many kinds of rRNA, mRNA and tRNA are there?

A

rRNA-few kinds but many copies
mRNA-many kinds but few copies
tRNA- many kinds and many copies

This sort of thing is easier to get your head around if you think about the jobs that each of the RNA does

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

What type of ribosomes do eukaryotic cells have?

A

60s+20s=80s

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

If the genetic code is read 5’ to 3’, what way are proteins produced? (N or C end first)

A

N terminal first

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

What is the first amino acid in every protein?

A

Methionine (AUG)

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

What are the 3 stop codons?

A

UAA, UAG, UGA

17
Q

What is a stem loop?

A

H bonds formed between Antiparallel sequences

18
Q

What is the base that recognises A, U + C?

A

Inosine

19
Q

What are the benefits of having inosine as a base in an anticodon?

A

It speeds up protein synthesis

20
Q

What happens during translation initiation?

A

mRNA binds to ribosome, AUG recognised

21
Q

What is tRNA called when it is attached to an amino acid?

A

Aminoacyl tRNA

22
Q

How are amino acids joined together during translation?

A

Translocation, amino acid on P site moved on top of amino acid on A site

(P site on left)*

23
Q

What enzyme is responsible for translocation?

A

Peptidyl transferase

MCBG (Milly's) (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions