W5 Enzymes Flashcards

1
Q

which enzyme cleaves all peptide bond sequences

A

papain

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

what does DNA polymerase I do

A

add nulceotides to template strand

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

what is an important feature of enzymes functions

A

specificity

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

what is Vmax of enzymes

A

rate of active sites being binded to
maximum saturation value

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

what does crystallography prove for on enzymes

A

E/S complexes are being formed

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

how does spectroscopic data prove E/S complexes

A

change of absorption and fluorescence of proteins

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

what are catalytic groups on active site

A

the amino acid side chains in the active site

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is k+1 for enzymes

A

forming of enzyme substrate

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

what is k-1 in enzymes

A

enzyme + substrate

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

what is V0

A

initial rate of reaction

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

what is K cat

A

when the energy is fully saturated

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

what is Km determined by

A

pH
temp
ionic strength

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

what is the rate determined by

A

k + 2 constant

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

from a graph how is Km determined

A

half of Vmax

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

what does low Km mean

A

more products

17
Q

what happens when the K cat is high

A

increase rate of reaction

18
Q

what is enzymes activity limited by

A

Diffusion rate

19
Q

whats the lineweaver burk plot

A

method of calculating Vmax and Km

20
Q

what is delta G independent of

A

reaction pathway

21
Q

what happens to transition state when enzyme reduce activation barrier

A

becomes lower

22
Q

what is rate of reaction depending on in transitiom state theory

A

larger delta g is slower reaction
smaller delta g is faster reaction

23
Q

what do enzymes do for recycling energy

A

convert wasteful energy into other types of energy

24
Q

what is the term for delta g negative

25
what is the term of delta g positive
endergonic
26
can enzymes change delta g
no
27
is the delta g used for rate of reaction if not what is it for
no, for energy of end products
28
what is used to promote unfavourable reactions
ATP
29
what is hexokinase an example of
coupled reactions
30
how does Keq affect products
high Keq = more products low Keq = small products
31
what happens when delta G doubles
Keq increases by 10x
32
what is the abbreviation for rate of ES
K+1
33
what is the abbreviation for rate of ES disassociation
k-1 and k+2
34
what is the Kcat representing
enzyme catalytic rate