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Multiple Choice
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1

What is it about carbon that allows it to form so many different compounds? It
A)has a valence of four.
B)has two electrons in its innermost shell (1s2).
C)has six electrons, which can form bonds with six other atoms forming a hexagon.
D)is easily ionized.
2

Which of the following hydrocarbons has a molecular formula of C2H2?
A)ethane
B)ethylene
C)ethene
D)none of the above
3

Which of the following is not a characteristic of alkanes?
A)Alkanes are unsaturated hydrocarbons.
B)Alkanes are called the paraffin series.
C)All carbon-carbon linkages are single bonds.
D)Alkanes can occur as straight structures, branched structures, or ring structures.
4

Which of the following is the correct formula for the group known as carboxylic acid?
A)=O=C
B)-CH3
C)-COOH
D)-NH2
5

Which is not a nitrogenous base found in DNA?
A)cytosine
B)hexane
C)adenine
D)uracil
6

Straight chain hydrocarbons with at least one triple bond between two carbon atoms are called
A)alkanes.
B)alkenes.
C)alkynes.
D)aromatic hydrocarbons.
7

Which of the following is a component of true fats?
A)phosphate
B)glycerol
C)amino group
D)adenine
8

Organic molecules with the same empirical formula but a different structural formula is called a (an)
A)isotope.
B)isometric.
C)isomer.
D)polymer
9

The major component of natural gas is
A)methane.
B)propane.
C)butane.
D)octane.
10

A hydrocarbon found in both gasoline and petroleum ether is
A)hexane.
B)octane.
C)decane.
D)nonane.
11

The first use of gasoline was as
A)lamp oil.
B)fuel for Ford's prototype cars.
C)a lubricant.
D)spot remover.
12

RNA is formed
A)by replicating a portion of the coding strand of DNA.
B)by linking amino acids together.
C)when a series of monosaccharides are joined.
D)only when a messenger RNA is required.
13

A light lubricating oil that has been decolorized and purified is
A)diesel fuel or distillate fuel oil.
B)kerosene or lamp oil.
C)gasoline.
D)mineral oil.
14

A long chain of many repeating units is called a (an)
A)tetramer.
B)polymer.
C)ester.
D)octamer.
15

The alcohol that can cause blindness and death is
A)methanol.
B)2-propanol.
C)ethanol.
D)absolute alcohol.
16

True fats belong to which major class of organic molecules?
A)carbohydrates
B)alcohol
C)lipids
D)nucleic acids
17

An example of a fatty acid is
A)lactic acid.
B)formic acid.
C)palmitic acid.
D)acetic acid.
18

Which of the following is not a macromolecule?
A)protein
B)carbohydrate
C)nucleic acid
D)petroleum ether
19

Which of the following statements about proteins is true?
A)Proteins are formed from 23 different amino acids.
B)Antibodies are proteins that protect the body from infection.
C)Proteins contain beta-amino acids.
D)Proteins are held together by peptide bonds between the R groups of different amino acids.
20

During the formation of a peptide bond from condensation of a carboxyl group of one amino acid and the amino group of a second amino acid, the products are a dipeptide and a(n)
A)water.
B)carbon dioxide.
C)carboxyl group.
D)amino group.
21

A major function of carbohydrates is
A)to catalyze reactions.
B)to provide structural support in the cell walls of plants.
C)to store energy in adipose tissue.
D)to store oxygen in a muscle cell.
22

The polysaccharide found in humans and other animals that provides a reserve of energy is called
A)cellulose.
B)starch.
C)glycogen.
D)lactose.
23

What does it mean when we say fat is unsaturated? It means that the fat contains
A)straight chain fatty acids with no branches.
B)several ring structures in addition to the fatty acids.
C)non-fatty acid structures as well as fatty acids.
D)at least one double bond between two carbon atoms of its fatty acid.
24

Which of the following is not a correct statement about the hydrogenation of soybean oil?
A)Double bonds are converted to single bonds.
B)An oil usually becomes a solid when left at room temperature after hydrogenation.
C)The soybean oil is converted into soap.
D)The unsaturated soybean oil is converted into a saturated fat.
25

Which of the following is not a correct statement about polyethylene?
A)Polyethylene is produced by polymerization of ethylene.
B)Polyethylene is used to make cellophane.
C)Polyethylene was used as an electrical insulating material during WWII.
D)A chlorine derivative of polyethylene is called polyvinyl chloride.





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