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unit_2.2_practice_test

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Name: 
 

UNIT 2.2



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Which of the following is not a large biomolecule?
a.
carbohydrate
b.
ice
c.
lipid
d.
nucleic acid
 

 2. 

Polysaccharides are
a.
carbohydrates.
b.
lipids.
c.
proteins.
d.
nucleic acids.
 

 3. 

Which of the following is a carbohydrate?
a.
ATP
b.
steroid
c.
wax
d.
sucrose
 

 4. 

Lipids are
a.
soluble in water.
b.
made of chains of amino acids.
c.
linked together with peptide bonds.
d.
used by the body for storing energy.
 

 5. 

All of the following are examples of lipids except
a.
oil.
b.
starch.
c.
steroids.
d.
candle wax.
 

 6. 

Which of the following molecules make up (compose) proteins?
a.
amino acids
b.
monosaccharides
c.
nucleotides
d.
sugars
 

 7. 

The overall shape of a single chain of amino acids in a protein is that protein’s
a.
primary structure.
b.
secondary structure.
c.
tertiary structure.
d.
quaternary structure.
 

 8. 

The amino group of one amino acid is linked to the carboxyl group of another amino acid in a protein. This link is a(n)
a.
peptide bond.
b.
hydrogen bond.
c.
ionic bond.
d.
polar bond.
 

 9. 

What gives each amino acid its unique properties?
a.
its side group
b.
its amino group
c.
its carboxyl group
d.
its sequence
 

 10. 

The two types of nucleic acids are
a.
RNA and ATP.
b.
DNA and RNA.
c.
DNA and ATP.
d.
nucleotides and ATP.
 

 11. 

Which of the following molecules are linked together to form nucleic acids?
a.
amino acids
b.
fats
c.
nucleotides
d.
sugars
 

 12. 

What type of molecule is ATP?
a.
amino acid
b.
fat
c.
nucleotide
d.
sugar
 

 13. 

DNA stores
a.
fat.
b.
carbohydrates.
c.
energy.
d.
hereditary information.
 

 14. 

The two strands of a DNA molecule are held together by
a.
ionic bonds.
b.
covalent bonds.
c.
hydrogen bonds.
d.
peptide bonds.
 

 15. 

A covalent bond means ____________________________.
a.
that two atoms are sharing an electon equally
b.
are sharing an electon but one is more electronegative and therefore has the electron closer to it
c.
that one atoms stole an electron from another atom
d.
none of the above
 

 16. 

The model shows water molecules interacting. The gray circles represent oxygen, the white circles represent hydrogen.
mc016-1.jpg
What conclusion is supported by this model?
a.
Slight negative charges around the oxygen molecule and the slight positive charges of hydrogen atoms form a polar molecule.
b.
The two hydrogen atoms are both attracted to the negative oxygen atom, sharing the electrons equally, forming a nonpolar molecule.
c.
Strong negative charge of oxygen molecules is equally shared by the hydrogen atoms, forming polar molecules that exhibit hydrogen bonding.
d.
The two hydrogen atoms generate a strong positive charge that attracts and bonds with the weak negative oxygen atom that exhibit ionic bonding.
 

 17. 

Which statement best explains the role of energy in cellular respiration?
a.
The cell creates energy by forming large molecules.
b.
The cell destroys energy by breaking down large molecules.
c.
The cell creates stored chemical energy by capturing solar energy.
d.
The cell moves stored chemical energy to different chemical bonds
 

 18. 

The diagram shows a model of the conversion between ATP and ADP.
mc018-1.jpg
Which statement does the model support?
a.
ATP and ADP do not contain energy.
b.
ATP contains more energy than ADP.
c.
ADP contains more energy than ATP
d.
ATP and ADP contain the same amount of energy.
 

 19. 

ATP (adenosine triphosphate) stores energy in the bonds between its __________.
a.
nucleotides
b.
carbon atoms
c.
hydrogen atoms
d.
phosphate groups
 

 20. 

What type of carbon-based molecule is the first to be broken down by the body's cells to provide a source of energy?
a.
fat
b.
protein
c.
amino acid
d.
carbohydrate
 

 21. 

When fatty acids cannot pack together tightly enough to make a solid fat, they have __________.
a.
very little glycerol
b.
more polar molecules
c.
fewer hydrogen atoms
d.
no double carbon bonds
 

 22. 

Carbon dioxide is converted into organic compounds in the __________.
a.
mitochondria
b.
the Krebs cycle
c.
the Calvin cycle
d.
the electron transport chain
 

 23. 

Unlike other carbon-based molecules, nucleic acids are known for their __________.
a.
single function
b.
varied structures
c.
poor bonding ability
d.
unimportance in cells
 

 24. 

What type of reaction is used to join monomers together by removing a hydrogen ion and a hydroxide ion?
a.
dessication
b.
dehydration
c.
claxial
d.
covalenagenesis
 

 25. 

These are joined together to form carbohydrates
a.
amino acids
b.
saccharides
c.
nucleotides
d.
ATP
 

 26. 

What is this
mc026-1.jpg
a.
amino acid
b.
lipid
c.
carbohydrate
d.
nucleotide
 

 27. 

What is this
mc027-1.jpg
a.
amino acid
b.
lipid
c.
carbohydrate
d.
nucleotide
 

 28. 

What is this

AMINE GROUP                                        CARBOXYL GROUP
mc028-1.jpg
a.
amino acid
b.
lipid
c.
carbohydrate
d.
nucleotide
 

 29. 

Which of the following are non-polar
a.
water
b.
ions
c.
lipids
d.
all of the above are non-polar
 

 30. 

Which of the following are nucleic acids?
a.
ATP
b.
DNA
c.
ribonucleic acid
d.
all of the above
e.
none of the others
 

 31. 

How many calories per gram do nucleic acids have?
a.
2
b.
4
c.
6
d.
9
e.
none of the other answers
 



 
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