Name: ______________________________
Date: ___________________
Period:_________
Biochemistry Quiz
1.
_______
Which is the MOST valid conclusion based on this graph?
a.
Enzymes are not affected greatly by
temperature.
b.
Enzymes work most effectively at low
temperatures.
c.
Raising the temperature always makes an
enzyme work better.
d.
Enzyme function decreases after a certain
favorable temperature.
2.
_______
The enzymes that catalyze cellular reactions are macromolecules made of organic
compounds composed of carbon, hydrogen, oxygen, and nitrogen. These types of
macromolecules are known as
a.
starches
b.
sugars
c.
proteins
d.
fats
3.
_______
Many plants have waxy coatings on some surfaces. This coating reduces water loss
because it is not water-permeable. This waxy coating is which of the following types of
organic molecule?
a.
carbohydrate
b.
lipid
c.
nucleic acid
d.
protein
4.
_______
Many land plants store energy in starch. When energy is needed, the starch molecules
can be broken down quickly. This chemical reaction produces which of the following?
a.
amino acids
b.
lipids
c.
monosaccharides
d.
RNA chains
5.
_______
Which of the following macromolecules are a prominent part of animal tissues that
function in insulation, helping animals conserve heat?
a.
carbohydrates
b.
lipids
c.
proteins
d.
nucleic acids
6.
7.
_______ Which of the following are commonly found in organic molecules?
I. Carbon
II. Nitrogen
III. Phosphorus
IV. Helium
A
I,II
B
II,IV
C
I, II, III
D
I, II, III, IV
_______
Using the data below regarding the presence of elements in the human body, which
element is NOT present in most enzymes.
Element
Oxygen
Carbon
Hydrogen
Nitrogen
Magnesium
a.
b.
c.
d.
8.
_______
Presence in Human Body
65%
18%
10%
3%
.05%
oxygen
carbon
hydrogen
magnesium
You are testing food solutions for carbohydrates, proteins, and lipids. Some of the tests
require a hot plate and glassware. What safety precautions should be observed in this
situation?
a.
Wait at least 5 minutes after testing before touching hot glassware.
b.
Use maximum heat setting for testing all solutions.
c.
Use only heat-resistant glassware without cracks.
d.
Continue heating solutions until all solvent has evaporated.
Water is classified as an inorganic compound because it
a.
does not contain carbon.
b.
does not contain nitrogen.
c.
contains hydrogen.
d.
contains oxygen.
9.
_______
10.
_______
Hemoglobin, insulin, albumin, and maltase which are composed of chains of amino
acids, are examples of
a.
proteins
b.
carbohydrates
c.
lipids
d.
nucleic acids
11.
_______
The bond that joins two amino acids together is known as
a.
a double bond
b.
a hydrogen bond
c.
an ionic bond
d.
a peptide bond
12.
_______
The diagram below is a pictograph representing the estimated chemical composition of
the human body. What percentage of the human body is composed of inorganic
material?
a.
25 %
b.
32 %
c.
68 %
d.
74%
13.
_______
Biology is the study of:
a.
Animals
b.
Plants
c.
Life
d.
The earth and its systems
14.
_______
To which group of biomolecules do enzymes
belong?
a.
Carbohydrates
b.
Proteins
c.
Nucleic Acids
d.
Lipids
15.
________
8 sugar molecules bonded together would be a
a.
monosaccharide
b.
disaccharide
c.
polysaccharide
d.
protein
16.
________
One characteristic of fats is:
a.
They attract water toward them.
b.
They are used to make new cells.
c.
They push water away from them.
d.
They store genetic information like DNA and RNA.
17.
________
Which of the following stores energy in cells:
a.
Proteins
b.
Lipids
c.
Nucleic Acids
d.
Nucleus
18.
________
In the human digestive system, the enzyme trypsin acts on proteins. The optimal
temperature for the enzyme is approximately 40 C. Which of the following graphs
shows how the activity of the enzyme most likely relates to the temperature of the
reaction environment?
For questions 19-21, use the food labels below.
19.
________
What is the primary type of biomolecule in Food 1?
a.
Lipid
b.
Carbohydrate
c.
Protein
d.
Cholesterol
20.
________
What is the primary type of biomolecule in Food 2?
a.
Lipid
b.
Carbohydrate
c.
Protein
d.
Cholesterol
21.
You are told that one of the foods is a type of fruit and the other is a type of meat.
a.
Which food is the meat?
_________________________
b.
Which food is the fruit?
_________________________
22.
________
Some bacteria contain a substance called nitrogenase. Nitrogenase catalyzes the
chemical reaction that converts atmospheric nitrogen (N2) into ammonia (NH3).
Nitrogenase is an example of which of the following?
a.
a sugar
b.
an enzyme
c.
a nucleotide
d.
an amino acid
23.
________
People with heart conditions are often required to limit their salt intake. According to
these labels, which food should a person on a low-salt diet choose?
a.
Q
b.
R
c.
S
d.
T
24.
________
Which food has the highest percent daily value of lipids?
a.
Q
b.
R
c.
S
d.
T
25.
________
A student reads a label that states, “This sports drink will help you keep going through a
tough workout, restoring essential vitamins and minerals to your body during exercise.”
Based on this claim, the student is able to conclude that the sports drink contains
a.
carbohydrates
b.
vitamins B, C, and D
c.
some types of vitamins and minerals
d.
the recommended daily amount of vitamins and minerals