Biochemistry Quiz 2

Name: 
Biochemistry 

 

 
True/False
Indicate whether the sentence or statement is true or false.
1.
When sugar is dissolved in water, the sugar and water are chemically combined.
2.
Functional groups are side groups of carbon compounds that confer specific properties to these compounds.
 
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
3.
Water molecules are polar, with the
a.
oxygen side being slightly positive and the hydrogen side being slightly negative.
b.
oxygen and hydrogen sides being slightly positive.
c.
oxygen and hydrogen sides being slightly negative.
d.
oxygen side being slightly negative and the hydrogen side being slightly positive.
4.
Which of the following organic compounds is the main source of energy for living things?
a.
carbohydrates
b.
lipids
c.
nucleic acids
d.
proteins
5.
Which of these is a characteristic of enzymes?
a.
they are protein
c.
they are reusable
b.
they are specific
d.
all of these
6.
Which element is found in proteins but not in carbohydrates and fats?
a.
nitrogen
c.
hydrogen
b.
carbon
d.
oxygen
7.
Which organic molecule below is most closely related to lipids?
a.
amino acids
c.
nucleotides
b.
CH2 chains
d.
sugars
             Molecule A        Molecule B
8.
Refer to the illustration above. Molecules like Molecule “B” are found in
a.
carbohydrates.
c.
nucleic acids.
b.
lipids.
d.
proteins.
9.
Which of the following is composed of fatty acids and glycerol?
a.
carbohydrate
c.
protein
b.
lipid
d.
nucleic acid
10.
This group of organic compounds includes monosaccharides:
a.
carbohydrates
c.
protein
b.
lipids
d.
nucleic acids
11.
Carbon is different from most other elements in that
a.
it has four electrons in its outermost energy level.
b.
it readily bonds with other carbon atoms.
c.
it can form single, double, or triple bonds with other atoms.
d.
it shares two electrons with another atom when it forms a covalent bond.
12.
Which of the following characteristics of water is not a result of hydrogen bonding?
a.
adhesive strength
b.
capillarity
c.
cohesive strength
d.
All of the above are a result of hydrogen bonding.
13.
Polysaccharides are
a.
carbohydrates.
c.
proteins.
b.
lipids.
d.
unsaturated fats.
14.
Enzymes involved in a chemical reaction:
a.
are used up during the reaction
b.
are decomposed during the reaction
c.
react more rapidly as the reaction progresses
d.
are not used up during the reaction
15.
Which organic compound is involved in heredity?
a.
carbohydrate
c.
proteins
b.
lipid
d.
nucleic acids
16.
Water molecules break up other polar substances,
a.
such as sugars.
b.
because of the uneven charge distribution that exists in water molecules.
c.
thus freeing ions in these substances for use by the body.
d.
All of the above
17.
When a glass is filled to the brim with water, the water appears to bulge from the sides of the glass due to
a.
capillarity
c.
adhesion
b.
thermal energy
d.
cohesion
18.
Lipids are soluble in
a.
water.
c.
oil.
b.
salt water.
d.
All of the above
19.
Which organic molecule below is classified as a carbohydrate?
a.
amino acid
c.
nucleotide
b.
CH2 chain
d.
sugar
20.
Which of the following is not an organic macromolecule?
a.
carbohydrate
c.
lipid
b.
ice
d.
nucleic acid
21.
Long chains of amino acids are found in
a.
carbohydrates.
c.
proteins.
b.
lipids.
d.
sugars.
22.
Amino acids are the building blocks of larger molecules called:
a.
cellulose
c.
fats
b.
proteins
d.
glycogen
23.
Which of the following is an organic compound?
a.
CaO
c.
C5H12
b.
H2O
d.
H2SO4
24.
All of the following are examples of carbohydrates except
a.
sugar.
c.
steroids.
b.
cellulose.
d.
glycogen.

 
   
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