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Biochem - Enzymes As Catalyst - Figures

Total questions: 55

Worksheet time: 28mins

Name
Class
Date
1.

a)

Enzyme-Catalyzed Reactions

b)

Glucose 6-phosphate & ADP

2.

a)

Enzyme-Catalyzed Reactions

b)

Glucose 6-phosphate & ADP

3.

a)

Free Enzyme

b)

Enzyme - substrate complex

c)

Transition-state complex

d)

Original enzyme

4.

a)

Free Enzyme

b)

Enzyme - substrate complex

c)

Transition-state complex

d)

Original enzyme

5.

a)

Free Enzyme

b)

Enzyme - substrate complex

c)

Transition-state complex

d)

Original enzyme

6.

a)

Free Enzyme

b)

Enzyme - substrate complex

c)

Transition-state complex

d)

Original enzyme

7.

a)

Enzyme-Catalyzed Reactions

b)

Glucose 6-phosphate & ADP

c)

Fisher’s Lock-and-Key Model

d)

Lock-and-Key Model

e)

KOSHLAND’S INDUCED FIT MODEL

8.

a)

Enzyme-Catalyzed Reactions

b)

Glucose 6-phosphate & ADP

c)

Fisher’s Lock-and-Key Model

d)

Lock-and-Key Model

e)

KOSHLAND’S INDUCED FIT MODEL

9.

a)

Enzyme-Catalyzed Reactions

b)

Glucose 6-phosphate & ADP

c)

Fisher’s Lock-and-Key Model

d)

Lock-and-Key Model

e)

KOSHLAND’S INDUCED FIT MODEL

10.

a)

Enzyme-Catalyzed Reactions

b)

Glucose 6-phosphate & ADP

c)

Fisher’s Lock-and-Key Model

d)

Lock-and-Key Model

e)

KOSHLAND’S INDUCED FIT MODEL

11.

Formation of the Acyl-Enzyme intermediate

in Chymotrypsin

a)

Substrate binding

b)

Histidine activates serine for nucleophilic attack

c)

The oxyanion tetrahedral intermediate is stabilized by hydrogen bonds

d)

Cleavage of the peptide bond

e)

The covalent acyl-enzyme intermediate

12.

Formation of the Acyl-Enzyme intermediate

in Chymotrypsin

a)

Substrate binding

b)

Histidine activates serine for nucleophilic attack

c)

The oxyanion tetrahedral intermediate is stabilized by hydrogen bonds

d)

Cleavage of the peptide bond

e)

The covalent acyl-enzyme intermediate

13.

Formation of the Acyl-Enzyme intermediate

in Chymotrypsin

a)

Substrate binding

b)

Histidine activates serine for nucleophilic attack

c)

The oxyanion tetrahedral intermediate is stabilized by hydrogen bonds

d)

Cleavage of the peptide bond

e)

The covalent acyl-enzyme intermediate

14.

Formation of the Acyl-Enzyme intermediate

in Chymotrypsin

a)

Substrate binding

b)

Histidine activates serine for nucleophilic attack

c)

The oxyanion tetrahedral intermediate is stabilized by hydrogen bonds

d)

Cleavage of the peptide bond

e)

The covalent acyl-enzyme intermediate

15.

Formation of the Acyl-Enzyme intermediate

in Chymotrypsin

a)

Substrate binding

b)

Histidine activates serine for nucleophilic attack

c)

The oxyanion tetrahedral intermediate is stabilized by hydrogen bonds

d)

Cleavage of the peptide bond

e)

The covalent acyl-enzyme intermediate

16.

Hydrolysis of the Acyl-Chymotrypsin Intermediate

a)

Water attacks the carbonyl carbon

b)

Second oxyanion tetrahedral intermediate

c)

Acid catalysis breaks the acyl-enzyme covalent bond

d)

The product is free to dissociate

17.

Hydrolysis of the Acyl-Chymotrypsin Intermediate

a)

Water attacks the carbonyl carbon

b)

Second oxyanion tetrahedral intermediate

c)

Acid catalysis breaks the acyl-enzyme covalent bond

d)

The product is free to dissociate

18.

Hydrolysis of the Acyl-Chymotrypsin Intermediate

a)

Water attacks the carbonyl carbon

b)

Second oxyanion tetrahedral intermediate

c)

Acid catalysis breaks the acyl-enzyme covalent bond

d)

The product is free to dissociate

19.

Hydrolysis of the Acyl-Chymotrypsin Intermediate

a)

Water attacks the carbonyl carbon

b)

Second oxyanion tetrahedral intermediate

c)

Acid catalysis breaks the acyl-enzyme covalent bond

d)

The product is free to dissociate

20.
a)

Thiamine pyrophosphate (TPP)

b)

Pyruvate Carbanion of TPP

c)

Resonance forms of ionized hydroxyethyl-TPP

21.

a)

Thiamine pyrophosphate (TPP)

b)

Pyruvate Carbanion of TPP

c)

Resonance forms of ionized hydroxyethyl-TPP

22.

a)

Thiamine pyrophosphate (TPP)

b)

Pyruvate Carbanion of TPP

c)

Resonance forms of ionized hydroxyethyl-TPP

23.

a)

CoASH

b)

Biotin

c)

Pyridoxal phosphate (PLP)

24.

a)

CoASH

b)

Biotin

c)

Pyridoxal phosphate (PLP)

25.

a)

CoASH

b)

Biotin

c)

Pyridoxal phosphate (PLP)

26.

a)

Lactate

b)

Pyruvate

27.

a)

Lactate

b)

Pyruvate

28.

a)

The normal reaction of acetylcholinesterase

b)

Reaction with organophosphorus inhibitors

29.

a)

The normal reaction of acetylcholinesterase

b)

Reaction with organophosphorus inhibitors

30.

a)

Penicillin

b)

Urate

c)

Hypoxanthine

d)

Xanthine

e)

Xanthine-enzyme complex

31.

a)

Penicillin

b)

Urate

c)

Hypoxanthine

d)

Xanthine

e)

Xanthine-enzyme complex

32.

a)

Penicillin

b)

Urate

c)

Hypoxanthine

d)

Xanthine

e)

Xanthine-enzyme complex

33.

a)

Penicillin

b)

Urate

c)

Hypoxanthine

d)

Xanthine

e)

Xanthine-enzyme complex

34.

a)

Penicillin

b)

Urate

c)

Hypoxanthine

d)

Xanthine

e)

Xanthine-enzyme complex

35.

a)

Allopurinol

b)

Alloxanthine (oxypurinol)

36.

a)

Allopurinol

b)

Alloxanthine (oxypurinol)

37.

a)

L-Lactate

b)

Pyruvate

c)

Oxidoreductases

38.

a)

L-Lactate

b)

Pyruvate

c)

Oxidoreductases

39.

a)

L-Lactate

b)

Pyruvate

c)

Oxidoreductases

40.

a)

Aspartate

b)

Oxaloacetate

c)

a-Ketoglutarate

d)

Glutamate

e)

Transferases

41.

a)

Aspartate

b)

Oxaloacetate

c)

a-Ketoglutarate

d)

Glutamate

e)

Transferases

42.

a)

Aspartate

b)

Oxaloacetate

c)

a-Ketoglutarate

d)

Glutamate

e)

Transferases

43.

a)

Aspartate

b)

Oxaloacetate

c)

a-Ketoglutarate

d)

Glutamate

e)

Transferases

44.

a)

Aspartate

b)

Oxaloacetate

c)

a-Ketoglutarate

d)

Glutamate

e)

Transferases

45.

a)

Fructose 1,6-biphosphate

b)

Dihydroxyacetone phosphate

c)

Glyceraldehyde 3-phosphate

46.

a)

Fructose 1,6-biphosphate

b)

Dihydroxyacetone phosphate

c)

Glyceraldehyde 3-phosphate

47.

a)

Fructose 1,6-biphosphate

b)

Dihydroxyacetone phosphate

c)

Glyceraldehyde 3-phosphate

48.

a)

Isomerases

b)

Ligases

49.

a)

Isomerases

b)

Ligases

50.

Distribution of all known enzymes by EC Classification number 1

a)

Oxidoreductases

b)

Transferases

c)

Hydrolases

d)

Lyases

e)

Isomerases

51.

Distribution of all known enzymes by EC Classification number 2

a)

Oxidoreductases

b)

Transferases

c)

Hydrolases

d)

Lyases

e)

Isomerases

52.

Distribution of all known enzymes by EC Classification number 3

a)

Oxidoreductases

b)

Transferases

c)

Hydrolases

d)

Lyases

e)

Isomerases

53.

Distribution of all known enzymes by EC Classification number 4

a)

Oxidoreductases

b)

Transferases

c)

ligases

d)

Lyases

e)

Isomerases

54.

Distribution of all known enzymes by EC Classification number 5

a)

Oxidoreductases

b)

Transferases

c)

ligases

d)

Lyases

e)

Isomerases

55.

Distribution of all known enzymes by EC Classification number 6

a)

Oxidoreductases

b)

Transferases

c)

ligases

d)

Lyases

e)

Isomerases

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