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6. When the body temperature of certain animals becomes 9. In a phosphorus-limited environment, the production
too high, they will often sweat to cool down. Which of which macromolecule would be affected the most?
property of water helps to account for the ability of (A) Carbohydrates
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sweat to cool the body? (B) Nucleic acids
(A) The adhesion of water molecules (C) Proteins
(B) The high specific heat of water (D) Lipids
(C) The ability of water to act as a solvent
10. The oxygen atom in the carboxyl group of a protein
(D) The high surface tension of water
becomes part of a water molecule during the formation
7. A small piece of potato is placed into a sucrose of a peptide bond. That water molecule may then go
solution. A student measured the initial mass to be on to take part in the hydrolysis of a polysaccharide.
10 g. The next day, the student removed the potato The path this oxygen atom takes is an example of the
from the sucrose solution and measured the final flow of
mass as 7 g. What is the percent change in mass of (A) matter.
the potato? (B) information.
(A) −30% (C) energy.
(B) +30% (D) gas.
(C) −43%
11. Depending on the arrangement of atoms in the ring
(D) +43%
structure of a monosaccharide, it may have which trait
8. Which best explains the type of bond between mono- compared to its linear structure?
mers and its role in the function of the macromolecule (A) Different functional groups
it forms? (B) Different bonds joining monosaccharides
(A) The glycosidic bonds that join amino acids (C) A different C:H:O ratio
together determine the overall structure of the (D) A different function
molecule, which determines how the protein will
function.
(B) The dehydration synthesis reaction that occurs
between lipid monomers forms only single bonds,
giving lipids their tightly packed structure.
(C) The covalent bonds in carbohydrates contribute
to the folding of complex tertiary carbohydrate
structures that lead to their role as energy
sources.
(D) The combination of phosphodiester bonds and
hydrogen bonds in nucleic acids allows for a stable
structure that is easily unzipped to transfer genetic
information.

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UNIT 1 MODULE Nucleic Acids 8989

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