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Amino acids

Total questions: 30

Worksheet time: 23mins

Name
Class
Date
1.
The bond that joins amino acids are called:
a)
Peptide Bonds
b)
Ester Bonds
c)
Glycosidic Linkages
d)
Phosphodiester Bonds
2.
Amino acids all have the same general structure except for the:
a)
Amino Group
b)
Carboxyl Group
c)
'R' Group
d)
Carbonyl Group
3.
The reaction used to digest and break the bond in red is:
a)
Hydrolysis
b)
Dehydration Synthesis
c)
Oxidation
d)
Single Displacement
4.
The primary sequence of a protein refers to the:
a)
Order of amino acids
b)
α-Helix or β-Pleated Sheet
c)
Interaction of subunits
d)
Hydrogen Bonding
5.
The amino acid isomer that is used to produce the proteins of all living things is the 
a)
L-Isomer
b)
D-Isomer
c)
α-Isomer
d)
β-Isomer
6.
The amino acid that results in disulphide bridges is:
a)
Cysteine
b)
Alanine
c)
Glutamic Acid
d)
Valine
7.
The structure of proteins can be changed by environmental factors such as temperature or pH.
a)
True
b)
False
8.
The tertiary structure folding in proteins is primary due to the interactions of....
a)
the 'R' groups
b)
the 'P' groups
c)
the 'A' groups
d)
the 'S'
9.
Which structure changes in the 20 different amino acids?
a)
#1
b)
#2
c)
#3
d)
#4
10.

Two or more polypeptides attached together and work as one unit

a)

Primary

b)

Secondary

c)

Tertiary

d)

Quaternary

11.
What gives a protein its unique shape?
a)
the unique sequence of amino acids in its polypeptide chain
b)
the unique folding due to the sequence of amnio acids in the polypeptide chain
c)
hydrogen bonding & unique interactions between the 'R' groups
d)
all of these
12.

The entire polypeptide forms a three-dimensional structure

a)

Primary

b)

Secondary

c)

Tertiary

d)

Quaternary

13.

Absorbs UV light at wavelength 280 nm

a)

Histidine

b)

Tryptophan

c)

Lysine

d)

Cysteine

14.

Contains a methyl group as side chain

a)

Histidine

b)

Glycine

c)

Alanine

d)

Proline

15.

Aromatic amino acids include

a)

phenyl alanine, tyrosine & tryptophan

b)

phenyl alanine, serine & tryptophan

c)

threonine, tyrosine & tryptophan

d)

aspergine, tyrosine & tryptophan

16.

cystine is the combination of

a)

cystine-methionine

b)

methionine-serine

c)

cysteine-cysteine

17.

which amino acid lacks the free amino group

a)

threonine

b)

valine

c)

isoleucine

d)

proline

18.

Amino acids are classified based on their chemical properties of ?

a)

Amine group

b)

Carboxylic group

c)

Side chain

d)

Benzine group

19.

Pick the correct "Non-polar" amino acid

a)
b)
c)
d)
20.

Pick the correct "Polar" amino acid

a)
b)
c)
d)
21.

What is an amino acid , which contains a "Base" side chain ?

a)
b)
c)
d)
22.

What is an amino acid , which contains a "Acidic" side chain ?

a)
b)
c)
d)
23.

What is an amino acid , which contains a "Neutral" side chain ?

a)
b)
c)
d)
24.

What is the amino acid which contains smallest side chain ?

a)

Alanine (A) - Ala

b)

Serine (S) - Ser

c)

Glycine (G) - Gly

d)

Tyrosine (Y) - Tyr

25.

What is the amino acid which contains 2 carboxylic groups ?

a)

Alanine (A) - Ala

b)

Serine (S) - Ser

c)

Aspartate (D) - Asp

d)

Tyrosine (Y) - Tyr

26.

Which group doesn't contain an amino acid ?

a)

Methionine, Tryptophane & Lysine

b)

Glycine, Formalin & Proline

c)

Glutamine, Hisidine & Serine

d)

Threonine, Cysteine & Valine

27.

potassium phtalamide is the reagent used for amino acid synthesis using

a)

Gabriel synthesis

b)

Strecker Synthesis

c)

Merrifield synthesis

d)

O donnell synthesis

28.

The C-terminal amino acid in the depicted tripeptide is _____.

a)

leucine,

b)

isoleucine

c)

alanine

d)

tyrosine

29.
Choose the correct answer.
a)
Every amide bond is a peptide bond.
b)
Every peptide bond is an amide bond.
30.

Quantification of protein using a UV spectrophotometer is based on ____

a)

UV light is absorbed by the backbone of the protein

b)

UV light is absorbed by the peptide bonds of the protein

c)

UV light is absorbed by the aromatic amino acids of the protein

d)

UV light is absorbed by all the non-aromatic amino acids of the protein

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