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Daily Concept Quiz
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1

Hydrocarbons with only a single bond between the carbon atoms
A)are called alkanes.
B)react more strongly than hydrocarbons with double and triple bonds.
C)have freezing points that get lower as the size of the hydrocarbon molecule gets bigger.
D)have all of the properties above.
E)have none of the properties above.
2

Gasoline is insoluble in water because
A)it has a different density than water.
B)it has other alkanes mixing with it.
C)its molecules bond differently than the molecules of water.
D)it vaporizes too easily.
3

How many electrons does a carbon atom in a hydrocarbon molecule share?
A)1
B)2
C)3
D)4
E)It can vary from 1 to 4
4

Which of the following are isomers of H6C3?
A)H6C4
B)H8C3
C)H12C3
D)All of these
E)None of these
5

Which of the following classes have members that contain only carbon, hydrogen, and oxygen?
A)Carbohydrates and lipids
B)Proteins
C)Nucleic acids
D)All the above do
E)None of the above do
6

Photosynthesis
A)produces glucose.
B)produces carbohydrates.
C)is an exothermic reaction.
D)is all of the above.
E)is none of the above.
7

Amino acids form the basic building blocks of
A)carbohydrates.
B)lipids.
C)proteins.
D)nucleic acids.
8

How many amino acids are there?
A)20
B)26
C)20 important ones and a few that are not as important
D)An indefinite number
9

DNA and RNA are
A)carbohydrates.
B)lipids.
C)proteins.
D)nucleic acids.
10

Adenine, thymine, cytosine, and guanine are
A)nucleic acids.
B)nucleotides.
C)phosphate groups.
D)pentose sugars.
E)nitrogen bases.





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