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Biochemistry Review

Total questions: 45

Worksheet time: 34mins

Name
Class
Date
1.
Proteins are made of monomers called ___________
a)
Nucleotides
b)
Monosaccharides
c)
Amino Acids
d)
Glycerol and fatty acids
2.
DNA and RNA are examples of 
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
3.
Nucleotides are monomers of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
4.
Monosaccharides are monomers of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
5.
Waxes, oils and fats are examples of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
6.
What is the function of nucleic acids?
a)
store genetic information
b)
store energy (long-term)
c)
store energy (short-term)
d)
build skin, hair, nails, muscles
7.
Which of the following organic compounds is the main source of energy for living things?
a)
carbohydrates
b)
lipids
c)
nucleic acids
d)
proteins
8.
Which macromolecule stores energy, insulates us, and makes up the cell membrane?
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
9.
All polymers are made up of...
a)
monosaccharides
b)
monomers
c)
proteins
d)
None of these
10.
What are the monomers of DNA?
a)
glycerols
b)
amino acids
c)
fatty acids
d)
nucleotides
11.
Lipids can be digested into what smaller subunits?
a)
nucleic acids
b)
amino acids
c)

fatty acids and glycerol

d)
glucose
12.
Which major macromolecule is being represented in this image? 
a)
carbohydrate
b)
lipid
c)
protein
d)
nucleic acid
13.
What type of macromolecule is being represented in this image? 
a)
carbohydrate
b)
lipid
c)
protein
d)
nucleic acid
14.

Which macromolecule is shown?

a)

lipid

b)

protein

c)

nucleic acid

d)

carbohydrate

15.

Sugar belongs to which class of macromolecules?

a)

proteins

b)

lipids

c)

nucleic acids

d)

carbohydrates

16.

DNA belongs to which class of macromolecules?

a)

proteins

b)

nucleic acids

c)

carbohydrates

d)

lipids

17.

Enzymes belong to which class of macromolecules?

a)

lipids

b)

carbohydrates

c)

proteins

d)

nucleic acids

18.

What elements (monomers) make up a protein?

a)

C, H, O

b)

C, H, O, N, (S)

c)

C, H, O, N, P

19.

How how carbohydrates and lipids similar?

a)

both contain C, H, O, N, P and store energy

b)

both contain C, H, O, N and give energy

c)

both contain C, H, O, N, S and store energy

d)

both contain C, H, O and give energy

20.
The element _______is found in all of the organic compounds.
a)
Iron
b)
Nitrogen
c)
Carbon
d)
Oxygen
21.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
22.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
23.
Each enzyme only has 1 substrate that will fit its active site.  What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
24.
In the diagram, what is letter A? 
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
25.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
26.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
27.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
28.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
29.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
30.

What happens when enzymes are heated to a high temperature?

a)

The enzymes die.

b)

The shape of the enzyme are changed and it denatures

c)

The enzymes' amino acid sequence changes.

d)

The enzymes remain the same

31.
Which of these is NOT true?
a)
Enzymes can denature (change shape) when the temperature gets too high.
b)
Enzymes can only be used once in a chemical reaction. 
c)
Extreme pH can denature enzymes.
d)
Enzymes speed up chemical reactions. 
32.
Based on the graph, what temperature does this enzyme work best? 
a)
15 C
b)
40 C
c)
30 C
d)
47 C
33.
What happens to an enzyme when it is denatured?
a)
Activation energy is lowered.
b)
It becomes stronger.
c)
It loses its shape.
d)
Activation energy is raised.
34.
Every enzyme has a optimal temperature and pH. True or False?
a)
True 
b)
False
35.
Enzymes are composed of which of the following monomers? 
a)
amino acids
b)
carbohydrates
c)
nucleotides
d)
monosaccharides
36.

Where does the chemical reaction take place between a substrate and enzyme?

4 lines
37.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
38.
The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?
a)
Enzymes increase the energy of the reactants.
b)
Enzymes decrease the energy level of the products.
c)
Enzyme decrease the activation energy of the reaction.
d)
Enzymes reverse the direction of the reaction.
39.

James is conducting an experiment on an enzyme commonly found in the human stomach. At a pH of 4, what could happen to this enzyme?

a)

It would catalyze the digestion of proteins at a faster rate.

b)

It would have no effect on its activity.

c)

It would function at its optimum activity level.

d)

It would possibly denature and lose function.

40.

An enzyme and substrate can be compared to

a)

lock and key

b)

a faucet

c)

a door hinge

d)

light switch

41.
Which molecules in this reaction are the products?
a)
CH4 and CO2
b)
H2O and O2
c)
CO2 and H20
d)
CH4 and H20
42.
Which molecules in this reaction are the reactants?
a)
CH4 and CO2
b)
H2O and O2
c)
CO2 and H20
d)
CH4 and H20
43.
Which of the following accurately describes this graph?
a)
Green reaction has an enzme so less energy is used than the purple reaction
b)
This reaction is endothermic and absorbing energy from its surroundings.
c)
The activation energy is the same for both the purple and green reactions.
d)
Different products are produced in the green reaction and purple reaction.
44.

One type of organic molecule is a MACROMOLECULE. What are the 4 types of macromolecules?

a)

Carbohydrates

b)

Lipids

c)

Proteins

d)

Sulfates

e)

Nucleic acids

45.

What is the smallest unit of a macromolecule?

a)

polymer

b)

monomer

c)

dimer

d)

trimer

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