1|Page
SFSU BIOL 212 FINAL 2026 EXAM |ALL
QUESTIONS AND CORRECT
DETAILED ANSWERS |RATED A+ |
NEW AND REVISED
Which of the following statements about anaerobic metabolism is
FALSE?
a) oxygen is limited or absent
b) pyruvate moves into the mitochondrion but then accumulates there,
since the Krebs cycle does not occur
c) most of the energy of the glucose molecule remains in the chemical
bonds of the carbon molecule
d) the electron transport chain does not occur since oxygen is needed as
the final electron acceptor - ANSWER- pyruvate moves into the
mitochondrion but then accumulates there, since the Krebs cycle does
not occur
From which of the following will the cell be able to harvest the most
chemical energy?
a) an NADH molecule
b) six carbon dioxide molecules
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c) two pyruvate molecules
d) a lactic acid molecule
e) a glucose molecule - ANSWER- a glucose molecule
Which of the following is NOT true of the cell membrane
a) Cholesterol influences how fluid the membrane is
b) Carbohydrates associate with proteins and lipids on the extracellular
side of the membrane
c) there are many different kinds of membrane proteins
d) in certain cells, the phospholipids arrange themselves into the shape
of a channel, in order to allow ions to transport across the membrane -
ANSWER- in certain cells, the phospholipids arrange themselves into
the shape of a channel, in order to allow ions to transport across the
membrane
The isolation of different proteins to the luminal vs. basolateral surfaces
of epithelial cells is due to the presence of ____________ between the
cells in the tissue
a) desmosomes
b) a pump
c) tight junctions
d) gap junctions - ANSWER- tight junctions
the GLUT family of molecules are:
a) channel proteins through which glutamic acid can travel
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b) carrier proteins for the facilitated diffusion of glucose
c) channel proteins through which glucose can diffuse
d) secondary active transport carriers, for moving both glucose and
sodium
e) more than one of the above is correct - ANSWER- carrier proteins for
the facilitated diffusion of glucose
Alcohol crosses the cell membranes in nerve tissue relatively easily.
Therefore alcohol has a:
a) high partition coefficient
b) low partition coefficient - ANSWER- high partition coefficient
Assuming that a substance is uncharged and is transported across a
membrane by facilitated diffusion carriers, according to Fick's Law, the
net movement of the substance will tend to increase as:
a) the membrane surface area decreases
b) the magnitude of the concentration gradient decreases
c) the number of carriers in the membrane increases
d) the thickness of the membrane surface increases
e) more than one of the above is correct - ANSWER- the number of
carriers in the membrane increases
Which of the following transport processes is the least likely to get
saturated?
a) channel protein
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b) facilitated diffusion
c) primary active transport
d) secondary active transport - ANSWER- channel protein
Which of the following statement about sodium and potassium ions is
TRUE?
a) the sodium ion has greater density of surface charge, so therefore it
becomes less hydrated.
b) the potassium ions nucleus has a larger radius, so therefore the radius
of the hydrated ion will be smaller
c) the potassium ions nucleus has a larger radius, so therefore the
potassium ion becomes more hydrated
d) more than one of the above is a true statement - ANSWER- the
potassium ions nucleus has a larger radius, so therefore the radius of the
hydrated ion will be smaller
When blood sugar is low, liver cells are able to convert glycogen to
glucose, thereby making the intracellular glucose concentration higher
than the extracellular glucose concentration. What would happen to the
facilitated diffusion of glucose throughout the GLUT when this occurs?
a) the movement of glucose will not change
b) the movement of glucose will stop
c) the movement of glucose will reverse directions, and the glucose will
leave the cell through the GLUT carriers - ANSWER- the movement of
glucose will reverse directions, and the glucose will leave the cell
through the GLUT carriers
SFSU BIOL 212 FINAL 2026 EXAM |ALL
QUESTIONS AND CORRECT
DETAILED ANSWERS |RATED A+ |
NEW AND REVISED
Which of the following statements about anaerobic metabolism is
FALSE?
a) oxygen is limited or absent
b) pyruvate moves into the mitochondrion but then accumulates there,
since the Krebs cycle does not occur
c) most of the energy of the glucose molecule remains in the chemical
bonds of the carbon molecule
d) the electron transport chain does not occur since oxygen is needed as
the final electron acceptor - ANSWER- pyruvate moves into the
mitochondrion but then accumulates there, since the Krebs cycle does
not occur
From which of the following will the cell be able to harvest the most
chemical energy?
a) an NADH molecule
b) six carbon dioxide molecules
,2|Page
c) two pyruvate molecules
d) a lactic acid molecule
e) a glucose molecule - ANSWER- a glucose molecule
Which of the following is NOT true of the cell membrane
a) Cholesterol influences how fluid the membrane is
b) Carbohydrates associate with proteins and lipids on the extracellular
side of the membrane
c) there are many different kinds of membrane proteins
d) in certain cells, the phospholipids arrange themselves into the shape
of a channel, in order to allow ions to transport across the membrane -
ANSWER- in certain cells, the phospholipids arrange themselves into
the shape of a channel, in order to allow ions to transport across the
membrane
The isolation of different proteins to the luminal vs. basolateral surfaces
of epithelial cells is due to the presence of ____________ between the
cells in the tissue
a) desmosomes
b) a pump
c) tight junctions
d) gap junctions - ANSWER- tight junctions
the GLUT family of molecules are:
a) channel proteins through which glutamic acid can travel
,3|Page
b) carrier proteins for the facilitated diffusion of glucose
c) channel proteins through which glucose can diffuse
d) secondary active transport carriers, for moving both glucose and
sodium
e) more than one of the above is correct - ANSWER- carrier proteins for
the facilitated diffusion of glucose
Alcohol crosses the cell membranes in nerve tissue relatively easily.
Therefore alcohol has a:
a) high partition coefficient
b) low partition coefficient - ANSWER- high partition coefficient
Assuming that a substance is uncharged and is transported across a
membrane by facilitated diffusion carriers, according to Fick's Law, the
net movement of the substance will tend to increase as:
a) the membrane surface area decreases
b) the magnitude of the concentration gradient decreases
c) the number of carriers in the membrane increases
d) the thickness of the membrane surface increases
e) more than one of the above is correct - ANSWER- the number of
carriers in the membrane increases
Which of the following transport processes is the least likely to get
saturated?
a) channel protein
, 4|Page
b) facilitated diffusion
c) primary active transport
d) secondary active transport - ANSWER- channel protein
Which of the following statement about sodium and potassium ions is
TRUE?
a) the sodium ion has greater density of surface charge, so therefore it
becomes less hydrated.
b) the potassium ions nucleus has a larger radius, so therefore the radius
of the hydrated ion will be smaller
c) the potassium ions nucleus has a larger radius, so therefore the
potassium ion becomes more hydrated
d) more than one of the above is a true statement - ANSWER- the
potassium ions nucleus has a larger radius, so therefore the radius of the
hydrated ion will be smaller
When blood sugar is low, liver cells are able to convert glycogen to
glucose, thereby making the intracellular glucose concentration higher
than the extracellular glucose concentration. What would happen to the
facilitated diffusion of glucose throughout the GLUT when this occurs?
a) the movement of glucose will not change
b) the movement of glucose will stop
c) the movement of glucose will reverse directions, and the glucose will
leave the cell through the GLUT carriers - ANSWER- the movement of
glucose will reverse directions, and the glucose will leave the cell
through the GLUT carriers
