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Unit 1. Molecules and Cells
A. Chemistry of Life


1.Which of the following is NOT a carbohydrate?
cellulose
chitin
glycogen
glucagon
starch

2.The structure above contains which functional group?
ketone
aldehyde
amine
carboxyl
sulfhydryl

3.Substance A has a pH of 4 and substance B has a pH of 8. Substance A is how many times more acidic than substance B?
2
4
10
1,000
10,000

Questions 4 - 7 refer to the following structures:
 
4.Which of the structures shown above is a carbohydrate?
A
B
C
D
5.Which of the structures shown above is an amino acid?
A
B
C
D
6.Which of the structures shown above is a polypeptide?
A
B
C
D
7.Which of the structures shown above is a steroid?
A
B
C
D

8.Which of the following describes the reaction represented above?
dehydration synthesis
hydrolysis
REDOX reaction
exergonic reactoin
endergonic reaction

9.Testosterone, a sex hormone, can be classified as which of the following types of macromolecule?
monosaccharide
fat
phospholipid
steroid
polypeptide

10.A molecule resembling a substrate binds to the active site of an enzyme and prevents the binding of the substrate. This is known as
noncompetitive inhibition
agonistic competition
competitive inhibition
induced fit
lock and key repression

11.Which of the following reactions, by defnition, results in the transfer of electrons?
hydrolysis reaction
dehydration synthesis reaction
endergonic reaction
exergonic reaction
redox reaction