1. Humans are aerobic organisms, which means that oxygen is required to sustain human life. What purpose does oxygen se

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1. Humans are aerobic organisms, which means that oxygen is
required to sustain human life. What purpose does oxygen
serve?
a.It gets added to sugar molecules to burn these carbohydrates
and release their energy.
b. It serves as an electron acceptor so that other electron
carriers can be regenerated.
c. It is converted into CO2 to release the
potential energy stored within fuel molecules.
d. None of the other answer choices are correct.
e. More than one of the other answer choices are correct.
2. A cancer cell has a very high division rate even when no
growth factors are present. Which of the following
a. A gain-of-function mutation in a growth factor receptor
gene.
b. A gain-of-function mutation in the gene encoding the
retinoblastoma protein that regulates entry into the cell
cycle.
c. A loss-of-function mutation in a cyclin gene.
d. None of the other answer choices are correct.
e. More than one of the other answer choices are correct.
3. Which of the following is an anticodon sequence found on a
tRNA charged with serine?
a. 5’-AGU-3’
b. 3’-ACU-5’
c. 5’-ACU-3’
d. 3’-ACT-5’
e. 5’-AGT-3’
f. None of the other answer choices are correct.
4. Red blood cells do not have mitochondria. Do these
cells use more, less, or the same amount of glucose to make
equivalent amounts of ATP as muscle cells that contain
mitochondria?
a. More
b. Less
c. The same amount
5. A mutation in the DNA changes an adenine to a guanine.
This adenine was the A in the AUG of a start codon for a
gene. What process or processes would this mutation
impact?
a. The initiation of both transcription and translation.
b. Only the initiation of transcription.
c. Only the initiation of translation.
d. Neither the initiation of transcription nor the initiation of
translation.
e. None of the other answer choices are correct.
6. The smaller a substance is, the more rapidly it will
diffuse across a lipid bilayer.
a.True
b. False
7. Molecules within a membrane, even charged ones, are able
to move laterally within the plane of the membrane.
a.True
b.False