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WorksheetsAP Biochemistry
Total questions: 35
Worksheet time: 24mins
Name
Class
Date
1.
Steroid hormones are signal molecules that are derived from lipids. Which of the following would be INCORRECT regarding steroid hormones?
a)
They are non-polar.
b)
They are hydrocarbons made up of carbon, hydrogen, and oxygen.
c)
They can freely cross the phospholipid bilayer of the cell membrane to signal molecules within the cell.
d)
Due to the fact that they are hydrophobic they will need to bind to a cell membrane receptor.
2.
Which property makes water molecules stick to other water molecules?
a)
adhesion
b)
cohesion
c)
capillary action
d)
polarity
3.
All organic compounds contain the element
a)
carbon
b)
nitrogen
c)
phosphorus
d)
sulfur
4.
Which macromolecule is shown?
a)
lipid
b)
protein
c)
nucleic acid
d)
carbohydrate
5.
Amino acids all have the same general morphology except for the:
a)
Amino Group
b)
Carboxyl Group
c)
'R' Group
d)
Carbonyl Group
6.
The diagram shows a bond forming between two amino acids. What is the name of this reciprocation?
a)
Dehydration Synthesis
b)
Hydrolysis
c)
Pepysis
d)
Oxidation
7.
___________ are some functions of lipids.
a)
storing energy and cell membrane structure
b)
providing actin & providing myosin
c)
cellulose structure and digestive assistance
d)
storing & transferring genetic info
8.
Changes in pH and temperature can damage an enzymes active site. What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
denature
9.
The monomer, building block, of proteins
a)
Amino Acid
b)
Fatty Acid
c)
Nucleotide
d)
monosaccharide
10.
The monomer, building block, of carbohydrates; simple sugar
a)
Amino acid
b)
Fatty Acid
c)
Nucleotide
d)
Monosaccharide
11.
Thalidomide and L-dopa, shown below, are examples of pharmaceutical drugs that occur as enantiomers, or molecules that
a)
are cis-trans isomers
b)
are mirror images of one another
c)
are mirror images of one another and have the same biological activity
d)
have identical three-dimensional shapes
12.
Which of the following statements correctly describes cis-trans isomers?
a)
They have the same chemical properties
b)
They have an asymmetrical carbon that makes them mirror images
c)
They have different molecular formulas
d)
They have variations in arrangement around a double bond
13.
Which of the structures shown is an impossible covalently bonded molecule?
a)
A
b)
B
c)
C
d)
D
14.
Which functional group has the molecular formula of CH3?
a)
Methyl
b)
Amino
c)
Hydroxy
d)
Carbonyl
15.
What type of isomer is shown?
a)
Structrual isomers
b)
Cis-trans isomers
c)
Enantiomers
d)
They're not isomers, its the same structure
16.
Which of the following properties of water enables it to move from the roots to the leaves of plants?
a)
Water expands as it freezes.
b)
Water is an excellent solvent.
c)
Water exhibits cohesive behavior.
d)
Water moderates temperature.
17.
Large bodies of water do not quickly fluctuate in temperature. Why?
a)
Water is a solvent.
b)
Water has a high heat capacity.
c)
Water acts as a buffer.
d)
Water is non-polar.
18.
What property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"
a)
Purity
b)
Polarity and cohesion
c)
High heat capacity
d)
Expansion upon freezing
19.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
20.
Water is polar because...
a)
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
b)
The molecule has two poles, at which the it is colder than other regions of the molecule.
c)
The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
d)
The water molecule is neutral.
21.
What is the reason why oil and water don't mix?
a)
Oil is too heavy to mix with water
b)
Water can only mix with polar molecules
c)
Water can only mix with non-polar molecules
d)
Oil is too light to mix with water
22.
A molecule with electrically charged areas is called a _______________.
a)
magnet
b)
polar molecule
c)
solution
d)
electrical molecule
23.
How many protons are in an atom with an atomic number of 50?
a)
0
b)
5
c)
50
d)
25
24.
If an element has an atomic number of 5 and an atomic mass of 10, how many neutrons are in this element?
A=P=E
M-A=N
A=P=E
M-A=N
a)
10
b)
50
c)
5
d)
2
25.
If an atom has 10 electrons, how many protons does it have?
a)
0
b)
1
c)
10
d)
5
26.
How many protons does an Aluminum atom have? (use the picture to help you)
a)
27
b)
13
c)
14
d)
40
27.
Isotopes have different numbers of
a)
protons
b)
neutrons
c)
electron
d)
properties
28.
The two strands making up the DNA double helix molecule
a)
contain ribose and deoxyribose in opposite strands.
b)
are held together by hydrogen bonds.
c)
are attached through a phosphate to hold the strands together.
d)
contain uracil but not thymine.
29.
Which of the following best summarizes the relationship between dehydration reactions and hydrolysis?
a)
Hydrolysis only occurs in the urinary system, and dehydration reactions
only occur in the digestive tract.
b)
Hydrolysis creates monomers, and dehydration reactions break down
polymers.
c)
Dehydration reactions can occur only after hydrolysis.
d)
Dehydration reactions assemble polymers, and hydrolysis breaks down
polymers.
30.
What is the molecule illustrated in the figure below?
a)
a trans polyunsaturated triacylglyceride
b)
a steroid similar to cholesterol
c)
a saturated fatty acid
d)
an unsaturated fatty acid
31.
At which level of protein structure are interactions between the side chains (R groups) most important?
a)
Primary
b)
Secondary
c)
Tertiary
d)
Quaternary
32.
The 20 different amino acids found in polypeptides exhibit different chemical and physical properties because of different
a)
amino groups attached to an alpha carbon
b)
asymmetric carbons.
c)
carboxyl groups attached to an alpha carbon
d)
side chains (R groups).
33.
Humans can digest starch but not cellulose because
a)
humans have enzymes that can hydrolyze the alpha glycosidic linkages of starch but not the beta
glycosidic linkages of cellulose.
b)
the monomer of starch is glucose, while the monomer of cellulose is
galactose.
c)
humans have enzymes that can hydrolyze the beta
d)
the monomer of starch is glucose, while the monomer of cellulose is
maltose.
34.
What is the term used for a protein molecule that assists in the proper folding of other proteins?
a)
tertiary protein
b)
enzyme protein
c)
chaperonin
d)
denaturing protein
35.
How many atoms can a Carbon atom potentially bind to?
a)
1
b)
2
c)
3
d)
4
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