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Biochemistry Pre-Test

Total questions: 21

Worksheet time: 12mins

Name
Class
Date
1.

Which compound is inorganic?

a)

glucose (C6Hl2O6)

b)

carbon dioxide (CO2)

c)

ethane (C2H6)

d)

stearic acid (Cl8H36O2)

2.
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
3.
Which of the following binds to the active site of an enzyme? 
a)
substrate
b)
product
c)
codon
d)
none of the above
4.
Which letter represents the negative end?
a)
A
b)
B
c)
C
d)
D
5.
Which of the following is LEAST likely to dissolve in water?
a)
nonpolar fats and oils
b)
polar sugar molecules
c)
salt made of a positive sodium ion and a negative chloride ion
d)
all of the substances will dissolve easily in water
6.
In the picture, which represents a fatty acid?
a)
F
b)
G
c)
H
d)
J
7.

Changes in temperature and pH can decrease an enzyme’s activity by breaking

a)

peptide bonds

b)

hydrogen bonds

c)

amino acids

d)

sulfur bonds

8.
Which of these statements describes how monomers combine and create macromolecules?
a)
Amino acids combine to make proteins.
b)
Glucose molecules combine to make nucleic acids.
c)
Nucleic acids combine to make starch.
d)
Proteins combine to make glucose.
9.

Which homolgous series contains a C=C double bond?

a)

alkanes

b)

alkenes

c)

alcohols

d)

carboxylic acids

10.

-COOH is the functional group for...

a)

alcohols

b)

esters

c)

carboxylic acids

d)

amides

11.

-OH is the functional group for...

a)

alcohols

b)

esters

c)

carboxylic acids

d)

amides

12.

Name this carboxylic acid

a)

ethanoic acid

b)

propanoic acid

c)

butyl butanoate

d)

butanoic acid

13.

All molecules of the alkane homologous series have which ending in their name?

a)

-ane

b)

-ene

c)

-anol

d)

-anoic acid

14.

The first four alkanes are listed below. In which list are they placed in the correct order, i.e. increasing number of carbon atoms?

a)

methane, ethane, propane, butane

b)

ethane, methane, propane, butane

c)

methane, ethane, butane, propane

d)

methane, propane, ethane, butane

15.
What is the pH level of an acid?
a)
7.1-14
b)
14-21
c)
0-6.9
d)
7
16.
A solution that keeps pH from changing.
a)
glucose
b)
carbohydrate
c)
monomer
d)
Buffer
17.
Why does ice float?
a)
As water freezes, it expands and its density decreases.
b)
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
c)
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
d)
As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
18.
Identify the biomolecule
a)
Lipid
b)
Protein
c)
Carbohydrate
d)
Nucleic Acid
19.
Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?
a)
double replacement 
b)
decomposition 
c)
combustion 
d)
single replacement
20.
What is the probable product of a double-replacement reaction?
a)
A new compound and a replaced metal
b)
A new compound and a replaced nonmetal
c)
2 different compounds 1 aqueous and 1 that is a solid, liquid or gas
d)
A single compound
21.
Which of the following is a balanced chemical equation?
a)
AgNO3 + NaCl → 4AgCl + 2NaNO3
b)
2AgNO3 + 2NaCl → 3AgCl + 2NaNO3
c)
AgNO3 + NaCl → AgCl + NaNO3
d)
AgNO3 + 2NaCl → AgCl + 3NaNO3

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