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Biochemistry > Enzymes Reclec > Flashcards

Enzymes Reclec Flashcards

1
Q

Act as biological catalyst

A

Enzymes

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2
Q

Increases the rate of reaction

A

Catalyst

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3
Q

Other term of inorganic cofactors of enzymes

A

Activators

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4
Q

Two cofactors of enzymes

A

Inorganic and organic

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5
Q

Other term for organic cofactors

A

Coenzymes

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6
Q

Enzymes that does not have a cofactor

A

Apoenzymes

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7
Q

Complete and active enzyme

A

Holoenzymes

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8
Q

Enzymes’ inactive form

A

Proenzyme / zymogen

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9
Q

Variants of enzymes

A

Isoenzymes

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10
Q

Where does the substrate binds to?

A

Active site

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11
Q

Where does the regulatory molecules binds?

A

Allosteric site

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12
Q

Who developed or established the classification system of enzymes

A

Enzymes commission (international union of biochemistry)

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13
Q

Enumerate the 6 classes of enzymes

A

1 oxidoreductases
2 tranferases
3 hydrolyses
4 lyases
5 isomerases
6 ligases

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14
Q

Joining of two molecules that needs ATP

A

Ligases

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15
Q

Redox reactions

A

Oxidoreductases

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16
Q

Transfer atom/groups

A

Tranferases

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17
Q

Removal of groups and creates double bond

A

Lyases

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18
Q

The binding of an enzymes to a substrate is a ______

A

Physical absorption

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19
Q

The substrate fits like a lock and the substrate binds exactly to the enzymes.

A

Lock & key theory

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20
Q

It imply that your enzymes are rigid

A

Lock & key theory

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21
Q

The active site of this theory undergo conformational change

A

Induced fit theory

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22
Q

The widely accepted theory

A

Induced fit theory

23
Q

Dependent on substrate concentration

A

First - order kinetics

24
Q

Dependent in enzyme concentration

A

Zero-order kinetics

25
Q

One substrate will only bind to one enzymes

A

Absolute specificity

26
Q

The enzyme will only accept substrate that has a hydrogen bond

A

Bond specificity

27
Q

The enzyme will only accept the substrate that has the same group

A

Group specificity

28
Q

The enzyme can only accept substrate that has the same configuration

A

Steroeoisometric specificity

29
Q

6 factors affecting enzymes activity

A

1 enzyme /substrate concentration
2 pH
4 temperature
4 cofactors
5 inhibitors
6 interference

30
Q

All enzymes are bound to substrate

A

Saturation kinetics

31
Q

Optimal pH for most enzymes

32
Q

Alkaline phosphatase requires a pH of _____

33
Q

Acid phosphatase requires a pH of ___

34
Q

Acid phosphatase requires a pH of ___

35
Q

Optimal temperature of enzymes

A

37 degree Celsius

36
Q

Loss of the folding structure of a protein

A

Denaturation

37
Q

Inactivation of enzymes occurs at what temperature

A

60-65 deg.celsius

38
Q

Temperature of denaturation of enzymes

A

40-50 deg. Celsius

39
Q

Non-protein molecules necessary for enzyme activity

40
Q

Inhibitors binds to active site

A

Competitive inhibitors

41
Q

Inhibitors binds to other sites

A

Non-competitive inhibitor

42
Q

Inhibitors binds to ES complex

A

Uncompetitive inhibitors

43
Q

Substrate needed to achieve maximum velocity

44
Q

Substrate needed to catalyze a reaction

45
Q

Vmax remains but km increases

A

Competitive inhibition

46
Q

Vmax decreases but Km remains

A

Non-competitive inhibition

47
Q

Vmax and Km both decrease

A

Uncompetitive inhibition

48
Q

Breakdown of RBCs

49
Q

Interference that increase the enzyme activity

50
Q

Interference that decreases the enzyme activity

51
Q

When or what phase do you measure your enzyme activity

A

Linear phase

52
Q

Measurement of enzyme activity that stops

53
Q

Measurement of enzyme activity that has no ends or it is measured continuously

A

Continuous/kinetic

54
Q

What do you use to measure the enzyme activity continuously

A

Continuous - reading spectrophotometer

Biochemistry (6 decks)

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