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N6.1 Chemistry of Proteins

Total questions: 22

Worksheet time: 11mins

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.

If a methyl group (-CH3), which does not like water, were at the 'R', the amino acid would likely be:

a)

Hydrophobic

b)

Hydrophilic

c)

Ionic

d)

Acidic

3.

The diagram shows a bond forming between two amino acids. What is the name of this reaction?

a)

Condensation

b)

Hydrolysis

c)

Digestion

d)

Oxidation

4.
Amino acids all have the same general structure except for the:
a)
Amino Group
b)
Carboxyl Group
c)
'R' Group
d)
Carbonyl Group
5.
The reaction used to digest and break the bond in red is:
a)
Hydrolysis
b)
Dehydration Synthesis
c)
Oxidation
d)
Single Displacement
6.
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
7.
The number of amino acids used to produce proteins for all living things is:
a)
20
b)
∞
c)
15
d)
42
8.
The structure of proteins can be changed by environmental factors such as temperature or pH.
a)
True
b)
False
9.
The sequence of amino acids is determined by:
a)
Genes
b)
Hydrogen Bonds
c)
Like Dissolves Like
d)
pH
10.
What kinds of food can you get protein from in your diet?
a)
Eggs
b)
Meat and Fish
c)
Nuts and Legumes
d)
All of the above
11.
The name of the initial chain of monomers in a protein is called.....
a)
polypeptide
b)
polysaccharide
c)
polyester
d)
polynucleotide
12.

The level of protein structure that results from weak interactions between R groups and results in small twists and folds in the polypeptide chain

a)

primary structure

b)

secondary structure

c)

tertiary structure

d)

quaternary structure

13.

Which of the following are essential amino acids? (Check all that apply.)

a)

lysine

b)

leucine

c)

alanine

d)

glutamate

e)

histidine

14.
When a protein unfolds, it is
a)
Denatured
b)
Building
c)
Adding amino acids
d)
Making food
15.

Two or more polypeptides attached together and work as one unit

a)

Primary

b)

Secondary

c)

Tertiary

d)

Quaternary

16.

Which of the following most specifically defines a protein?

a)

amino acid chain

b)

folded amino acid chain

c)

one or more folded amino acid chains

d)

the amino acids coded for by a gene

17.

how many amino acids are involved in making and running the human body?

(a)  

18.

There are (a)   essential amino acids for humans.

19.

There are (a)   non-essential amino acids for humans.

20.

Which of the following are essential amino acids? (Check all that apply.)

a)

tryptophan

b)

isoleucine

c)

histidine

d)

serine

e)

asparagine

21.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shapes of the enzyme are altered or denatured
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
22.

Which levels of structure does hemoglobin possess? (Check all that apply.)

a)

primary

b)

secondary

c)

tertiary

d)

quaternary

e)

quintic

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