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Biomolecules and Enzymes

Total questions: 39

Worksheet time: 39mins

Name
Class
Date
1.
Which biomolecule is responsible for insulation and long term energy storage?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
2.
Which biomolecule helps form body structures like muscles?
a)
Nucleic Acid
b)
Carbohydrate
c)
Protein
d)
Lipids
3.
Which biomolecule includes sugars, cellulose and starch?
a)
Lipids
b)
Proteins
c)
Carbohydrates
d)
Nucleic Acid
4.
Which biomolecule is made of the monomer amino acids?
a)
Nucleic Acid
b)
Carbohydrate
c)
Protein
d)
Lipid
5.
Which biomolecule is your main source of energy?
a)
Nucleic Acid
b)
Protein
c)
Lipid
d)
Carbohydrate
6.
Which biomolecule contains fats, oils, and waxes?
a)
Proteins
b)
Nucleic Acid
c)
Lipids
d)
Carbohydrate
7.
The monomer of a protein is called...
a)
an amino acid
b)
a monosaccharide
c)
a fatty acid
d)
a nucleotide
8.
Enzymes are considered to be 
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
9.
What is the purpose  of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
10.
Letter D in the picture is...
a)
active site
b)
enzyme
c)
substrate
d)
products
11.
The enzyme known as ‘catalase’ is involved in the breakdown of hydrogen peroxide molecules into separate water and oxygen molecules. During this reaction, what happens to the ‘catalase’?
a)
The enzyme would become products: O2 and H20
b)
The enzyme would be fully used up and discarded.
c)
The enzyme would remain unchanged in any way.
d)
The enzyme would become a new type of enzyme.
12.
What is being represented by the letter A in the image?
a)
Substrate
b)
Enzyme
c)
Product
d)
Complex
13.
The part of the enzyme that the substrate bonds to is called the _____.
a)
active site
b)
activation energy
c)
bond site
d)
dehydration synthesis
14.
What makes an enzyme substrate specific?
a)
Size
b)
Shape
c)
Name
d)
Location it is found in
15.
Enzymes need certain environmental conditions in order to function properly.  What happens when enzymes are heated to a high temperature?
a)
they die
b)
they denature (change shape)
c)
they change their amino acid sequence
d)
they work better
16.
Which of the following is a nucleic acid (nucleotide)?
a)
A
b)
B
c)
C
d)
D
17.
Which of the following determines an enzyme's effectiveness?
a)
heat
b)
pH (acidic or basic)
c)
not enough enzymes; too many substrates
d)
all are correct
18.
Why does the shape of an enzyme determine its function?
a)
enzymes are specific to substrates (lock and key)
b)
enzymes can work with any substrate
c)
enzymes are activated by molecules
d)
enzymes are found everywhere
19.

As food travels through the digestive system, it is exposed to a variety of pH levels. The stomach has a pH of 2 due to the presence of hydrochloride acid (HCl), and the small intestine has a pH ranging from 7 to 9. HCl converts pepsinogen into pepsin, an enzyme that digests proteins in the stomach. Which of the following most likely happens to pepsin as it enters the small intestine?

a)

It becomes inactive.

b)

It begins to replicate.

c)

It's shape changes to engulf large proteins.

d)

It's activity increases to digest more proteins.

20.

You are analyzing a compound in the laboratory. You find that it is made up of carbon, hydrogen, and oxygen in a ratio of two hydrogen atoms for each carbon atom. How will you classify the compound?

a)

lipid

b)

protein

c)

carbohydrate

d)

nucleic acid

21.

What will most likely happen if an appropriate enzyme is added to a chemical reaction?

a)

The reaction rate will increase.

b)

The equilibrium of the reaction will be maintained.

c)

The reaction rate will decrease.

d)

The reaction will stop.

22.

A sugar, a phosphate group, and a nitrogen base form the building blocks of which organic compound?

a)

carbohydrates

b)

lipids

c)

nucleic acids

d)

proteins

23.
What is the function of nucleic acids?
a)
Stores energy
b)
Stores genetic information
c)
Movement
d)
Physical structure
24.
What are the components of a nucleotide?
a)
nitrogen base, phosphate group, and pentose sugar
b)
pentose sugar, purine, and pyrimidine
c)
nitrogen base and a phosphate group
d)
DNA, phosphate group, monosaccharide
25.

Which part of the nucleotide changes and makes it unique?

a)

Sugar

b)

Phosphate

c)

Nitrogen base

d)

Glycerol

26.

What is being represented by the letter C in the image?

a)

Substrate

b)

Enzyme

c)

Product

d)

Enzyme- Substrate Complex

27.
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.
28.
Based on the graph, what is the optimal temperature for this enzyme? 
a)
15oC
b)
40oC
c)
30oC
d)
35oC
29.
Enzymes speed up reaction rates by changing...
a)
Activation Energy
b)
pH
c)
Hydrogen Bonds
d)
Kinetic Energy
30.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
31.

Which four elements are the most abundant in biomolecules? SELECT ALL that apply.

a)

Carbon and Hydrogen

b)

Oxygen and Nitrogen

c)

Oxygen and Phosphorus

d)

Hydrogen and Oxygen

32.

These two molecules are examples of molecules that have different sugars and one of five nitrogen bases they are... SELECT ALL that apply.

a)

DNA

b)

RNA

c)

Sucrose

d)

Glucose

33.

What are lipids composed of?

a)

fatty acid

b)

nucleotides

c)

monosaccharide

d)

amino acid

34.
What are the four biological molecules?
a)
proteins, carbohydrates, lipids, nucleic acids
b)
A, T, C, G
c)
water, air, earth, and fire
d)
Joe, Nick, and Kevin Jonas
35.
Which biomolecule contains fats and oils?
a)
Proteins
b)
Nucleic Acid
c)
Lipids
d)
Carbohydrate
36.
Enzymes produce a specific reaction.
a)
True
b)
False
37.
What is being represented by the letter B in the image?
a)
Active Site
b)
Enzyme
c)
Substrate
d)
Product
38.
What is the purpose  of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
39.
Many monomers can be linked together to form ______________. 
a)
building blocks
b)
chemical reactions
c)
polymers
d)
energy

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