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WorksheetsSTEM Bio - Theme 2 Test Review
Total questions: 55
Worksheet time: 34mins
Name
Class
Date
1.
Which macromolecule stores energy, insulates us, and makes up the cell membrane?
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
2.
Which are enzymes?
a)
simple carbohydrates
b)
proteins that speed up chemical reactions
c)
lipids that make up the cell membrane
d)
a building block of DNA
3.
DNA and RNA are examples of...
a)
proteins
b)
nucleic acids
c)
carbohydrates
d)
lipids
4.
Another name for fats and oils
a)
proteins
b)
sugar
c)
lipids
d)
nucleic acids
5.
Which organelle breaks down sugar into something our cells can use? (ATP)
a)
cell membrane
b)
mitochondria
c)
Golgi body
d)
endoplasmic reticulum
6.
All polymers are made up of...
a)
monosaccharides
b)
monomers
c)
proteins
d)
None of these
7.
What is the function of nucleic acids?
a)
Stores energy
b)
Stores genetic information
c)
Movement
d)
Physical structure
8.
What is the monomer of proteins?
a)
amino acids
b)
polypeptides
c)
nucleotides
d)
monosaccharides
9.
Phospholipids are used in what biological structure?
a)
RNA
b)
DNA
c)
Cell membrane
d)
Cell wall
10.
What is the monomer of nucleic acids?
a)
Glycerol
b)
Monosaccharides
c)
Amino Acids
d)
Nucleotides
11.
The loss of a protein's structure is called...
a)
Denaturation
b)
Unfolding
c)
Coiling
d)
Inactivation
12.
Plant cell walls consist mainly of ----
a)
chitin
b)
peptidoglycan
c)
cellulose
d)
none of the above
13.
The characteristic that all lipids have in common is----
a)
made of fatty acids and glycerols
b)
acidic when mixed with water
c)
no high energy content
d)
do not dissolve in water
14.
All carbohydrates are:
a)
made of amino acids
b)
composed of carbon, hydrogen and oxygen atoms
c)
made of fatty acids
d)
composed of carbon, hydrogen, oxygen and nitrogen atoms
15.
What suffix is used in the names of most carbohydrates?
a)
-ase
b)
-nic
c)
-ose
d)
-yme
16.
Enzymes affect the chemical reactions in cells by changing the:
a)
pH of the cell
b)
heat of the reaction
c)
products of the reaction
d)
speed of the reaction
17.
What suffix is used in the names of most enzymes?
a)
- ase
b)
- gen
c)
- yme
d)
-nic
18.
The substance on which an enzyme acts is the:
a)
product
b)
substrate
c)
active site
d)
activation energy
19.
RNA contains the sugar...
a)
Deoxyribose
b)
Glucose
c)
Ribose
d)
Lipids
20.
Monosaccharides are the monomers for which major macromolecules?
a)
Photosythesis
b)
Monosaccharides
c)
Carbohydrates
21.
All organic compounds contain the element
a)
carbon
b)
nitrogen
c)
phosphorus
d)
sulfur
22.
What word describes when a molecule is attracted to water?
a)
hydrophobic
b)
hydrophilic
c)
bipolar
d)
solvent
23.
A strong acid might have a pH of _.
a)
2
b)
14
c)
11
d)
7
24.
A substance that has more Hydroxides (OH-) ions than Hydrogen (H+) is called a(n) ____.
a)
acid
b)
base
25.
A substance that has more Hydrogen (H+) ions than Hydroxides (OH-) is called a(n) ____.
a)
acid
b)
base
26.
A neutral substance would have a pH of __.
a)
1
b)
7
c)
14
27.
substance that dissolves
a)
solvent
b)
solution
c)
solute
d)
unsaturated
28.
substance that dissolves the solute
a)
solution
b)
solvent
c)
saturation
29.
Which macromolecule is made of simple and complex sugars?
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
30.
Which macromolecule is pictured?
a)
carbohydrate
b)
protein
c)
lipid
d)
nucleic acid
31.
Which macromolecule is pictured?
a)
carbohydrate
b)
lipid
c)
protein
d)
nucleic acid
32.
Which macromolecule is pictured?
a)
carbohydrate
b)
lipid
c)
protein
d)
nucleic acid
33.
Which macromolecule is pictured?
a)
carbohydrate
b)
lipid
c)
protein
d)
nucleic acid
34.
A process that involves rearrangement of the molecular structure of a substance
a)
Chemical change
b)
Physical change
c)
Activation change
d)
Reactant change
35.
Crushing a can is an example of
a)
Chemical change
b)
Physical change
c)
Activation change
d)
Reactant change
36.
What are the products of the chemical reaction?CH4 + 2O2 -->
CO2 + 2H2O
CO2 + 2H2O
a)
CH4 + 2O2
b)
2H2O+ 2O2
c)
CO2 + 2H2O
d)
CH4 +CO2
37.
Does the energy diagram show an exothermic reaction of an endothermic reaction?
a)
Endothermic
b)
Exothermic
38.
How much activation energy is required to start this reaction?
a)
40 kJ
b)
100 kJ
c)
60kJ
d)
20 kJ
39.
How much energy is lost in this chemical reaction?
a)
20 kJ
b)
40 kJ
c)
80 kJ
d)
60 kJ
40.
What is the chemical equation represented in the energy diagram?
a)
A+B-->C+D
b)
C+D-->A+B
c)
A-->B-->C-->D
d)
A+B<--C+D
41.
An enzyme is a
a)
Protein
b)
Carbohydrate
c)
Lipid
d)
Nucleic Acid
42.
An enzyme's _________ determines its function.
a)
Structure
b)
Name
c)
Concentration
d)
pH
43.
Which line shows the energy of the reaction WITH enzyme?
a)
Black
b)
Red
c)
Both
44.
Which letter shows the activation energy required WITHOUT enzyme?
a)
A
b)
B
c)
C
45.
Would the test tube that this reaction occurs in feel warm or cold?
a)
Warm
b)
Cold
46.
Which letter represents the enzyme?
a)
A
b)
B
c)
C
d)
E
47.
Which of the following correctly describes enzymes?
a)
They are lipids.
b)
They are reusable.
c)
They all work at the same pH.
d)
They work best when they are denatured.
48.
An enzyme fits its substrate like
a)
a lock and key
b)
peas and carrots
c)
a product and reactant
49.
The pH of the stomach is between 1.5 and 3. Which enzyme would most likely be found in the stomach?
a)
pepsin
b)
salivary amylase
c)
alkaline phosphatase
50.
The optimum pH for alkaline phophatase is
a)
2
b)
6
c)
8
d)
9
51.
Which letter represents the active site?
a)
a
b)
b
c)
c
d)
d
52.
A solution has a pH of 3. It is
a)
a base
b)
an acid
c)
neutral
53.
Because water is polar, it forms weak ____________ bonds--the hydrogen in one water molecule is attracted to the oxygen in another water molecule.
a)
Nitrogen
b)
Peptide
c)
Hydrogen
d)
Covalent
54.
Bases will release ______ ions when in water.
a)
hydrogen (H+)
b)
hydroxide (OH-)
c)
H2O
55.
Which of the following will NOT denature enzymes?
a)
heat
b)
radiation
c)
strong chemicals
d)
optimum pH
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