1. Which of the following is the most common kind of chemical bond in biological molecules? A. Covalent B. Ionic C. Delo

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1. Which of the following is the most common kind of chemical
bond in biological molecules?
A. Covalent
B. Ionic
C. Delocalized
D. Unsaturated
2. A cylinder and an airtight piston are used in the following
experiment. The piston is pushed up and down in the cylinder and
the resulting pressure of the air inside the cylinder is measured
with a pressure gauge. The results of the experiment are recorded
in the following table: Volume of Air (L) Pressure Reading (Atm) 8
1 4 2 2 4 1 8 A hypothesis concerning the apparatus is stated as
follows: “When the volume of the cylinder is decreased, the
pressure is increased.” Which of the following statements is
true?
A. The hypothesis is supported by the experimental data.
B. The hypothesis is refuted by the experimental data.
C. The hypothesis is not addressed by the experiment.
D. There is not enough information to make a judgment about the
hypothesis.
3. Which of the following procedures is an appropriate negative
control for testing the hypothesis that air contains bread mold
spores?
A. Seal slices of bread in a container to minimize air
contact.
B. Place slices of bread in a refrigerated environment.
C. Add ingredients to the bread recipe that will slow mold
growth.
D. Expose a different mold-supporting medium to air.
4. A researcher wants to develop a new pharmaceutical compound
to treat pain. Which of the following strategies will likely be the
most effective process?
A. Test extracts from newly discovered plants for pain-killing
substances.
B. Read anthropological studies to discover plants identified to
relieve pain.
C. Study molecular structures of existing pain medications and
make structural analogs.
D. Research the pain receptors of people who have unusually high
pain thresholds.