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Worksheets

Amino acids

Total questions: 29

Worksheet time: 15mins

Name
Class
Date
1.

Conversion of inactive trypsinogen into active trypsin in the gut is initiated by

a)

Enteropeptidase

b)

Prolidase

c)

Proteasome

d)

Pepsin

2.

Optimal pH for pepsin is close to

a)

2

b)

3

c)

4

d)

5

3.

Which of the following enzymes are activated by autoproteolysis?

a)

Trypsin

b)

Lipase

c)

Dipeptidase

d)

Prolidase

4.

Which of the following enzymes is an exopeptidase?

a)

Carboxypeptidase

b)

Pepsin

c)

Chymotrypsin

d)

Cathepsin

5.

Which of the following proteases cleaves specifically at arginine and lysine residues

a)

Trypsin

b)

Chymotrypsin

c)

Pepsin

d)

Cathepsin

6.

This protease prefers cleavage at aromatic amino acid residues

a)

Chymotrypsin

b)

Trypsin

c)

Enteropeptidase

d)

Proline-specific protease

7.

Which protease works inside the stomach?

a)

Pepsin

b)

Trypsin

c)

Chymotrypsin

d)

Cathepsin

8.

This is ...

a)

L-Alanine

b)

D-Alanine

c)

D-Serine

d)

L-Serine

9.

This is...

a)

L-Arginine

b)

L-Citrulline

c)

L-Lysine

d)

L-Ornithine

10.

This is...

a)

L-Asparagine

b)

L-Glutamic acid

c)

L-Glutamine

d)

L-Citrulline

11.

This is...

a)

L-Citrulline

b)

L-Asparagine

c)

L-Arginine

d)

L-Lysine

12.

This is...

a)

L-Cysteine

b)

L-Cystine

c)

L-Serine

d)

D-Serine

13.

This is...

a)

L-Glutamine

b)

L-Glutamic acis

c)

D-Asparagine

d)

L-Asparagine

14.

This is...

a)

L-Isoleucine

b)

L-Leucine

c)

L-Serine

d)

L-Valine

15.

This is...

a)

L-Methionine

b)

L-Serine

c)

L-Cysteine

d)

L-Cystine

16.

This is..

a)

L-Ornithine

b)

L-Lysine

c)

L-Citrilline

d)

L-Glutamine

17.

This is...

a)

L-Phenylalanine

b)

L-Alanine

c)

L-Tyrosine

d)

L-Valine

18.

This structural formula corresponds to...

a)

L-Lysine

b)

L-Tyrosine

c)

L-Citrulline

d)

No correct answer listed...

19.

This is...

a)

L-Valine

b)

L-Alanine

c)

L-Isoleucine

d)

L-Leucine

20.

This is

a)

L-Proline

b)

L-Alanine

c)

D-Valine

d)

L-Tryptophane

21.

This is

a)

L-Histidine

b)

D-Tryptophane

c)

L-Tryptophane

d)

L-Lysine

22.

This is...

a)

L-Serine

b)

D-Serine

c)

L-Threonine

d)

D-Threonine

23.

This is...

a)

L-Threonine

b)

L-Serine

c)

Glycine

d)

L-Valine

24.

This is...

a)

D-Lysine

b)

L-Lysine

c)

D-Ornithine

d)

L-Ornithine

25.

L-Lysine is a ...

a)

essential amino acid for humans

b)

conditionally essential amino acid

c)

non-essential amino acid

d)

non-nutritive amino acid

26.

L-Methionine is a...

a)

essential amino acid in humans

b)

conditionally essential amino acid

c)

non-essential amino acid in humans

d)

non-nutritive amino acid

27.

L-Cysteine is a

a)

essential amino acid in humans

b)

conditionally essential amino acid

c)

non-essential amino acid

d)

non-nutritive amino acid

28.

L-Glutamic acid is a...

a)

essential amino acid for humans

b)

conditionally essential amino acid

c)

non-essential amino acid

d)

non-nutritive amino acid

29.

Which of the following proteases uses ATP for its activity?

a)

Proteasome

b)

Enteropeptidase

c)

Pepsin

d)

Cathepsin