9. The three-dimensional structure of macromolecules is formed and maintained
oo oo oo oo oo oo oo oo
ooprimarily through noncovalent interactions. Which one of the following is NOT
oo oo oo o o oo oo oo oo oo oo
ooconsidered a oo
noncovalent interaction? oo
A) carbon-carbon bonds oo
Page 2 oo
, B) hydrogen bonds oo
C) hydrophobic interactions oo
D) ionic interactions oo
E) van der Waals interactions
oo oo oo
10. Which element is NOT among the four most abundant in living
oo oo oo oo oo oo oo oo oo oo
organisms?
oo
A) carbon
B) hydrogen
C) nitrogen
D) oxygen
E) phosphorus
11. The four covalent bonds in methane (CH4) are arranged around carbon to give
oo oo oo oo oo oo oo oo oo oo oo oo
which
oo
geometry?
A) linear
B) tetrahedral
C) trigonal bipyramidal oo
D) trigonal planar oo
E) trigonal pyramidal oo
12. What functional groups are present on this
oo oo oo oo oo oo
molecule?
oo
A) ether and aldehyde
oo oo
B) hydroxyl and aldehyde oo oo
C) hydroxyl and carboxylic acid
oo oo oo
D) hydroxyl and ester oo oo
E) hydroxyl and ketone oo oo
13. The macromolecules that serve in the storage and transmission of genetic
oo oo oo oo oo oo oo oo oo oo
information
oo
are:
A) carbohydrates.
B) lipids.
Page 3 oo
, C) membranes.
D) nucleic acids.
oo
E) proteins.
14. Stereoisomers that are nonsuperimposable mirror images of each other are known
oo oo oo oo oo oo oo oo oo oo
ooas:
A) anomers.
B) cis-trans isomers.
oo
C) diastereoisomers.
D) enantiomers.
E) geometric isomers.oo
Page 4
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