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WorksheetsUnit 2 Review: Chemistry
Total questions: 50
Worksheet time: 41mins
Name
Class
Date
1.
Practice Question: What class is this?
a)
Biology
b)
Chemistry
c)
English
d)
Uhhhhhhh
2.
One job of nucleic acids is to:
a)
store the body's genetic information
b)
store long-term energy
c)
rebuild muscles and hair
d)
speed up chemical reactions
3.
This macromolecule composes fats, oils, and waxes.
a)
lipids
b)
proteins
c)
nucleic acids
d)
carbohydrates
4.
This macromolecule group is used by the body for long-term storage of energy.
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
5.
Sugars (like glucose) and starch are examples of this macromolecule:
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
6.
Examples of nucleic acids include:
a)
amino acids
b)
sugars and starches
c)
fats and oils
d)
DNA and RNA
7.
The __________ is the part of the enzyme that a substrate fits into.
a)
product
b)
active site
c)
enzyme
d)
substrate
8.
Amino acids are the monomers of:
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
9.
Enzymes are considered to be:
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
10.
What is the purpose of an enzyme?
a)
stop a reaction from occurring
b)
raise the activation energy for a reaction
c)
speed up a chemical reaction
d)
control how many reactions occur
11.
Heat is used to cook eggs. In this reaction, heat is:
a)
a product
b)
a catalyst
c)
an ingredient
d)
a compound
12.
The energy needed to start a reaction is called:
a)
activation energy
b)
adhesion energy
c)
chemical energy
d)
cohesion energy
13.
Which of the following statements about enzymes is NOT true?
a)
enzymes can bind to substrates many times
b)
enzymes work best at specific temperatures
c)
enzymes are lipids
d)
enzymes are proteins
14.
What property describes water molecules sticking to other water molecules?
a)
adhesion
b)
cohesion
c)
capillary action
d)
polarity
15.
Which is the monomer (building block) for nucleic acids?
a)
amino acid
b)
fatty acid
c)
nucleotide
d)
sugar molecule
16.
This type of food will provide the body with short-term energy:
a)
carbohydrates/sugars
b)
protein
c)
fats/lipids
d)
nucleic acids
17.
These are the substances that enter into the left side of a chemical reaction.
a)
reactants
b)
products
c)
catalysts
d)
results
18.
In this image, the purple structure represents a(n):
a)
substrate
b)
enzyme
c)
product
d)
activation energy
19.
These are the substances that are formed in a reaction and are written on the right side.
a)
reactants
b)
catalysts
c)
products
d)
ingredients
20.
What property describes when water molecules are attracted to other substances?
a)
cohesion
b)
adhesion
c)
solubility
d)
surface tension
21.
Attractions between water molecules are called:
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
22.
What word means the basic unit of any molecule? (hint: the six common ones are CHONPS)
a)
Element
b)
Monomer
c)
Polymer
d)
Compound
23.
A compound or molecule containing carbon is considered to be:
a)
organic
b)
inorganic
c)
a macromolecule
d)
an element
24.
What property of water makes it able to dissolve many solutes?
a)
it is a polar molecule
b)
it is a small molecule
c)
it has hydrogen and oxygen
d)
it falls apart easily
25.
The building blocks of polymers are called:
a)
monomers
b)
macromolecules
c)
nucleic acids
d)
fatty acids
26.
What two elements make up water?
a)
helium and oxygen
b)
hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
27.
How many different elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
28.
How many Carbons (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
29.
How many Hydrogens (H) are in C6H12O6?
a)
6
b)
12
c)
24
d)
0
30.
Is H2O an element, compound, or mixture?
a)
element
b)
compound
c)
mixture
d)
none of the above
31.
Is O2 an element, compound, or mixture?
a)
element
b)
compound
c)
mixture
d)
none of the above
32.
Which is the correct formula for: two hydrogen (H), one sulfur (S), and four oxygen (O)?
a)
H2SO4
b)
HHSOOOO
c)
H4S2O
d)
3H2OS
33.
The red numbers in the image represent:
a)
subscripts
b)
coefficients
c)
reactants
d)
products
34.
The blue numbers in the image represent:
a)
reactants
b)
coefficients
c)
subscripts
d)
products
35.
C + OH2 --> CO2 + H
In this equation, what are the reactants?
In this equation, what are the reactants?
a)
C + OH2
b)
C
c)
CO2 + H
d)
H
36.
C + OH2 --> CO2 + H
In this equation, what are the products?
In this equation, what are the products?
a)
C + OH2
b)
C
c)
CO2 + H
d)
H
37.
A molecule that contains two or more elements is called:
a)
an atom
b)
a molecule
c)
a compound
d)
a mixture
38.
Which of these models best represents water, H2O?
a)
A
b)
B
c)
C
d)
D
39.
All of these are examples of a chemical compound except:
a)
H2
b)
PO
c)
SO2
d)
H2O
40.
Carbohydrates are made of...
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
41.
Lipids are made of...
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N P S
42.
Nucleic Acids are made of...
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
43.
Proteins are made of...
a)
C H O
b)
C H O N and sometimes S
c)
C H O N P
d)
C H O N P S
44.
The six common elements essential to life are:
a)
Carbon, Nitrogen, Oxgyen, Sodium Phosphorus, Bromine
b)
Sulfur, Nitrogen, Iron, Carbon, Helium, Neon
c)
Sulfur, Phosphorus, Carbon, Oxygen, Potassium, Hydrogen
d)
Carbon, Oxygen, Nitrogen, Hydrogen, Phosphorus, Sulfur
45.
You stir a cup of sugar into a pot of water. The sugar being dissolved is the:
a)
solvent
b)
solute
c)
mixture
d)
solution
46.
You stir a cup of sugar into a pot of water. The water is the:
a)
solvent
b)
solute
c)
mixture
d)
solution
47.
Having two different charges (positive and negative) means a molecule is...
a)
a reaction
b)
non-polar
c)
polar
d)
a hydrogen bond
48.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
d)
impossible to know
49.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
d)
impossible to know
50.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
d)
impossible to know
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