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Genetics Exam Review #2 Enzymes and Proteins

Total questions: 19

Worksheet time: 18mins

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.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
4.
What is structure A?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
5.
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 .
6.
What makes an enzyme substrate specific?
a)
Size
b)
Shape
c)
Name
d)
Location it is found in
7.
The part of the enzyme that the substrate bonds to is called the _____.
a)
active site
b)
activation energy
c)
bond site
d)
peptide bond
8.
What is the function of an enzyme?
a)
enzymes break themselves into small pieces
b)
enzymes slow down chemical reactions
c)
enzymes speed up chemical reactions
d)
enzymes combine products to form reactants 
9.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
10.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
11.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
12.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
13.

What happens when enzymes are heated to a high temperature?

a)

The enzymes die.

b)

The shapes of the enzyme are altered.

c)

The enzymes' amino acid sequence changes.

d)

The enzymes remain the same

14.
Every enzyme has a optimal temperature and pH. True or False?
a)
True 
b)
False
15.

Any change in the nucleotide sequence of the DNA of a gene is called

a)

codon

b)

anticodon

c)

translation

d)

mutation

16.
Which of the following best defines a gene?
a)
A diploid cell containing two sets of chromosomes
b)
A unit made up of chromosomes that control for a specific trait
c)
A segment of DNA that codes for a particular protein
d)
All the other answers are correct.
17.
Mutations affect the ________ of a protein. Because of this the proteins ______ is affected as well. 
a)
gene, function 
b)
sequence, gene
c)
shape,function
18.

Genetic mutations can be...

a)

beneficial, harmful, or neutral

b)

beneficial only

c)

harmful only

d)

neutral only

19.

Which of the following statements best describes why a change in only one DNA nucleotide base of a gene on the DNA strand could result in an incorrect protein being produced by the gene?

a)

The change prevents mRNA from being made.

b)

The change causes cells to divide in an uneven way.

c)

The change creates an additional mRNA strand.

d)

The change alters the amino acid sequence coded for by the

gene.

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