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Concept 1 Review

Total questions: 28

Worksheet time: 23mins

Name
Class
Date
1.
Enzymes are considered to be 
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
2.
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
3.
How do enzymes increase the speed of chemical reactions?
a)
reducing the number of products   
b)
reducing the activation energy
c)
increasing the temperature of the cell
d)
increasing the concentration of reactants 
4.
After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
a)

asubstrate (s)

b)

enzyme(s)

c)

product(s)

d)

inhibitor(s)

5.
Based on the graph, what temperature does this enzyme work best? 
a)
15 C
b)
40 C
c)
30 C
d)
47 C
6.

In a chemical reaction, ________ are what you have at the end

a)

Products

b)

Molecules

c)

Reactants

d)

Substances

7.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
8.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
9.

The illustration shows cell respiration. Is the overall reaction of cell respiration an Endothermic or an Exothermic reaction?

a)

Endothermic

b)

Exothermic

10.

Photosynthesis takes place inside of leaf cells. Sunlight is required. Is this an Exothermic or an Endothermic reaction?

a)

Endothermic

b)

Exothermic

11.
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. 
12.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shapes of the enzyme are altered denature
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
13.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
14.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
15.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
16.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
17.
Which substrate would this enzyme catalyze?
a)
Δ
b)
σ
c)
d)
μ
18.

When these bond together, they form a protein

a)

Amino Acids

b)

Peptide Bonds

c)

Ribose

d)

Nucleotides

19.

What is the monomer of a protein?

a)

monosaccharide

b)

glycerol/fatty acid

c)

amino acid

d)

nucleotide

20.

Which of the following is NOT a function of proteins?

a)

Catalysts

b)

Long term energy

c)

Transport

d)

Structure

21.

What is the name for a chain of amino acids?

a)

Polypeptide chain

b)

Triglycerides

c)

Polysaccharides

d)

Nucleotides

22.
Does the order of amino acids in a protein matter?
a)
YES!
b)
NO!
23.

What happens when an enzyme is heated to a high temperature?

a)

The enzyme remains the same.

b)

The enzymes amino acid sequence changes.

c)

The shapes of the enzyme are altered or denatured.

d)

The enzyme dies.

24.

What happens to a protein when it is denatured?

a)
Activation energy is lowered.
b)
It becomes stronger.
c)
It loses its shape.
d)
Activation energy is raised.
25.

Which of the following is NOT a factor that could lead to denaturing in a protein?

a)

Too hot

b)

Too Cold

c)

Too Acidic

d)

Too much protein

26.

Which level of protein structure describes a protein's three-dimensional shape?

a)

Primary

b)

Secondary

c)

Tertiary

d)

Quaternary

27.

What is the name for a chain of amino acids?

a)

Polypeptide chain

b)

Triglycerides

c)

Polysaccharides

d)

Nucleotides

28.

What subgroup of proteins speeds up chemical reactions?

a)

fatty acids

b)

starches

c)

enzymes