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Biochemistry Review

Total questions: 46

Worksheet time: 29mins

Name
Class
Date
1.

What suffix is used to name enzyme?

a)

-logy

b)

-ase

c)

-cule

d)

-lyst

2.

Speeds up chemical reactions by lowering activation energy.

a)

Hydrolysis

b)

Biological Catalyst/Enzyme

c)

Denature

3.

An enzyme/protein is severely damaged and has unfolded. Because structure affects function these proteins/enzymes will no longer work. What has happened?

a)

Water is added to sucrose to split it into smaller sugars.

b)

An enzyme or protein is denatured

4.

What is the model used to describe how an enzyme fits with a substrate?

a)

Denature

b)

Lock and Key Model

c)

Hydrolysis

d)

Activation Energy

5.

Enzymes help speed up chemical reactions by lowering activation energy. What are the structural components?

a)

A. CHO

b)

B. CHON

c)

C. CHONP

d)

D. CH

6.

Which macromolecule function is incorrectly listed?

a)

Lipids

b)

Proteins

c)

Nucleic Acids

d)

Carbohydrates

7.

What is the name for a protein that speeds up chemical reactions without having to change the temperature of your body?

a)

A. Enzyme

b)

B. Glycerol

c)

C. Nucleotide

d)

D. Fatty Acids

8.

What is the term used to describe the energy needed to start a reaction?

a)

Activation Energy

b)

Enzyme

c)

Denature

d)

Hydrolysis

9.

What factors DO NOT affect how well an enzyme works (some of these could denature the enzyme)?

a)

Temperature

b)

Concentration

c)

pH

d)

Color

10.

True or False: Monomers are single subunits that are linked together to form polymers.

a)

True

b)

False

11.

What elements make up Nucleic Acids?

a)

Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus (CHONP)

b)

Carbon, Hydrogen, Oxygen (CHO)

c)

Carbon, Hydrogen, Oxygen, Nitrogen (CHON)

12.

A polysaccharide is a _________.

a)

Carbohydrate

b)

Lipid

c)

Nucleic Acid

d)

Protein

13.

Identify the following image.

a)

Carbohydrate

b)

Nucleic acid

c)

Protein

d)

Lipid

14.

Which of the following organic compounds is the main source of energy (quick energy source) for living things?

a)

Nucleic Acids

b)

Lipids

c)

Carbohydrates

d)

Proteins

15.

Identify the following image.

a)

Carbohydrate

b)

Nucleic acid

c)

Protein

d)

Lipid

16.

What are the monomers for lipids?

a)

Nucleotides

b)

Amino Acids

c)

Fatty Acids and Glycerol

d)

Monosaccharides

17.

Which is an example of lipids?

a)

Sugar

b)

Oil

c)

Salt

d)

Grain

18.

What is a function of carbohydrates?

a)

Genetic Material

b)

Immune Response

c)

Short-term (quick) Energy

d)

Make Cell Membrane

19.

What is the monomer of nucleic acids?

a)

Glycerol

b)

Amino Acids

c)

Polysaccharides

d)

Nucleotides

20.

What are 2 examples of Nucleic Acids?

a)

Fatty Acids and Glycerol

b)

Saturated and Unsaturated Fats

c)

DNA and RNA

d)

Amino Acids and Enzymes

21.

Which macromolecules are enzymes?

a)

Carbohydrate

b)

Lipid

c)

Nucleic Acid

d)

Protein

22.

What is an enzyme?

a)

A protein

b)

A carbohydrate

c)

A catalyst

23.

Label the parts of the enzyme model

a)

Substrate

b)

Products

c)

Enzyme

d)

Active site

1
2
3
4
1)
2)
3)
4)
24.

Which of the of the following is true of enzymes?

a)

Enzymes are made of lipids.

b)

Enzymes are made of proteins.

c)

Enzymes are made of carbohydrates.

d)

Enzymes are made of nucleic acids.

25.
What is structure A?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
26.

Enzymes ​ ​ ​ ​

a)
lower activation energy
b)
increase activation energy
c)
function as catalysts
d)
protein
e)
does not speed up chemical reaction
27.

  • When active site gets deformed and loses its shape it causes a loss of biological activity

a)

lock & key model

b)

renaturation

c)

the dying of an enzyme

d)

denaturation

28.

If the enzyme is denatured…

a)

No effect

b)

Reaction rate increases

c)

Reaction rate decreases

d)

Reaction stops

29.
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.
30.

What does it mean for an enzyme to denature?

a)
An enzyme denatures when it gains a new shape and function.
b)
An enzyme denatures when it becomes more efficient at its function.
c)
An enzyme denatures when it becomes inactive.
d)
An enzyme denatures when it loses its shape and function.
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.

Question 74

What happens when an enzyme is denatured?

a)

It folds into a compact 3D shape

b)

It binds to an active site

c)

It unfolds and stops working

d)

It unfolds and works faster

33.

Abigail is conducting a biology experiment in her school lab. She is studying the effects of different factors on enzyme activity. She wants to know which two factors can denature an enzyme. Can you help Abigail?

a)

pH and light

b)

pH and concentration

c)

pH and temperature

d)

temperature and light

34.

In our enzyme lab, we tested how well peroxidase from celery cells worked under different conditions by measuring the amount of bubbles that were produced. What is the independent variable in that experiment?

a)

The amount of bubbles produced

b)

The carrot cells

c)

The different conditions

d)

the test tubes

35.

Which will most likely occur if there is a significant change in the temperature or pH of an enzyme?

a)

The enzyme will become one of the products.

b)

The enzyme will be unable to catalyze the reaction.

c)

The enzyme will change the products of the reaction.

d)

The enzyme will cause the rate of reaction to increase.

36.
Question Image

Using the diagram, match the following.

a)

A

1.

Substrate

b)

B

2.

Enzyme

c)

C

3.

Active Site

d)

D

4.

Product

e)

E

5.

Enzyme Substrate Complex

37.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
38.
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.
39.

What are two factors that can affect an enzymes ability to function?

a)

No changing

b)

temperature and pH

c)

night and day

d)

hot and cold

40.

Enzymes can be affect by: (select all that apply)

a)

Temperature

b)

Shape

c)

pH

d)

Color

41.

Enzymes are very ​ (a)   . Meaning they need the right ​ (b)   and ​ (c)   or they will ​ (d)   (break).

Choose from the below words
specific
unspecific
temperature
pH
denature
color
size
work
42.

Which will most likely occur if there is a significant change in the temperature or pH of an enzyme?

a)

The enzyme will become one of the products.

b)

The enzyme will be unable to catalyze the reaction.

c)

The enzyme will change the products of the reaction.

d)

The enzyme will cause the rate of reaction to increase.

43.
What happens when an enzyme is denatured?
a)
It can no longer function
b)
the rate of the reaction is significantly increased
c)
the reaction slows down, and then speeds back up
d)
it becomes a super enzyme and makes reactions go even faster
44.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
45.

Which best explains why the rate of a biochemical reaction decreases at high temperatures?

a)

The activation energy increases.

b)

The shape of the enzyme changes.

c)

The enzyme-substrate complex forms.

d)

The bonds between substrates are broken.

46.

Which best explains how the structure of enzymes is related to their function?

a)

Enzyme structures release the energy in their substrates.

b)

Enzyme structures react with their substrates.

c)

Enzymes’ unique active site allows it to fit with only one substrate molecule.

d)

Enzymes interact with their substrates like welders building a steel skyscraper.

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