Free Printable Amino acids and Proteins -part 1

1.

Proteins contain_______

a)

Only L- alpha - amino acids

b)

Only D- alpha amino acids

c)

Only L beta Amino acids

d)

Both Alpha and beta amino acids

2.

Which of the following is

optically inactive amino acid ?

a)

Valine

b)

Glycine

c)

Threonine

d)

Aspartic acid

3.

Amino acid has ____ charge at its iso electric point

a)

Both positive and negative

b)

Only positive

c)

Only negative

d)

No net charge

4.

1. ______ is a sulphur containing essential amino acid

a)

Methionine

b)

Valine

c)

Aspargine

d)

Cysteine

5.

1.

An example

of sulphur containing amino acid is(

a)

2-Amino-3-mercaptopropanoic acid

b)

2-Amino-3-methylbutanoic acid

c)

2-Amino-3-hydroxypropanoic acid

Amino acetic acid

d)

2-Amino-3-hydroxypropanoic acid

Amino acetic acid

6.

_____ is an aromatic amino acid

a)

Tyrosine

b)

Taurine

c)

Histidine

d)

Aspargine

7.

_______ Amino acid has side chain containing basic groups

a)

2-Amino 5-guanidovaleric acid

b)

2-Pyrrolidine carboxylic acid

c)

2-Amino 3-mercaptopropanoic acid

d)

2-Amino propanoic acid

8.

Which of the following amino acid is essential amino acid in human beings.

a)

Aspartate

b)

Tyrosine

c)

Methionine

d)

serine

9.

______ is used for the synthesis of most non essential amino acids

a)

Glucose

b)

Nucleotides

c)

All of the given options

d)

Other non essential amino acids

10.

Non essential amino acids

a)

Are not essential in making tissue proteins

b)

Are not synthesized in the human body

c)

Have no role in the metabolism

d)

Can be synthesized from glucose

11.

An example of polar amino acid is

a)

Alanine

b)

Leucine

c)

Valine

d)

Arginine

12.

1.

Which one of the following is semi- essential amino acid for

humans

a)

Valine

b)

Arginine

c)

Lysine

d)

Tyrosine

13.

The amino acid with a nonpolar side chain is _____

a)

Serine

b)

Valine

c)

Asparagine

d)

Threonine

14.

A ketogenic amino acid is _____

a)

Valine

b)

Cysteine

c)

Leucine

d)

Threonine

15.

An amino acid that terminates alpha helix is _____

a)

Valine

b)

Proline

c)

Tyrosine

d)

Tryptophan

16.

Which of the following amino acids are not found in proteins

a)

Beta -Alanine

b)

All of the given options

c)

L Ornithine

d)

D Glycine

17.

A vasodilating compound is produced by the decarboxylation of the amino acid:

a)

Arginine

b)

Aspartic acid

c)

Glutamine

d)

Histidine

18.

Biuret reaction is specific for_____

a)

–CONH-linkages

b)

–CSNH₂ group

c)

–(NH)NH₂ group

d)

All of these

19.

The most of the ultraviolet absorption of proteins between 240 to 280 nm is due to their content of

a)

Tryptophan and Tyrosine

b)

Aspartate and Glutamate

c)

Alanine and Valine

d)

Glutamine and Aspargine

20.

Which of the following is a biologically important tripeptide?

a)

Anserine

b)

Oxytocin

c)

Glutathione

d)

Kallidin

21.

A cereal protein soluble in 70% alcohol but insoluble in water or salt solution is_____

a)

Protamine

b)

Glutelin

c)

Gliadin

d)

Albumin

22.

Each turn of α -helix contains the amino acid

residues (number):

a)

3.6

b)

3.0

c)

4.2

d)

4.5

23.

Distance traveled per turn of a-helix

in nm is___

a)

0.53

b)

0.54

c)

0.44

d)

0.48

24.

Each amino acid residue advances the alpha helix by ______nm along the long axis of the helix

a)

0.15

b)

0.10

c)

0.12

d)

0.20

25.

Tertiary structure

of a protein describes

a)

The order of amino acids

b)

Location of disulphide bonds

c)

Loop regions of proteins

d)

The ways of protein folding

Amino acids and Proteins -part 1

Total questions: 25

Worksheet time: 12mins

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