BIO SCI 93 MIDTERM 2 PRACTICE QUESTIONS
Catabolism is to anabolism as ___________________ is to ___________________.
a.) exergonic; spontaneous
b.) exergonic; endergonic
c.) free energy; entropy
d.) work; energy - Answers- b
Most cells cannot harness heat to perform work because
a.) heat does not involve a transfer of energy.
b.) cells do not have much thermal energy; they are eventually cool.
c.) temperature is usually uniform throughout a cell.
d.) heat can never be used to do work. - Answers- c
Which of the following metabolic processes can occur without a net influx of energy
form some other process?
a.) ADP + P ->> ATP+H2O
b.) C6H12O6 + 6H2O ->> 6CO2 + 6H2O
c.) 6CO2 + 6H2O ->> C6H12O6 + 6H2O
d.) Amino Acids ->> Protein - Answers- b
The final electron acceptor of the electron transport chain that functions in aerobic
oxidative phosphorylation is
a) Oxygen
b) Water
c) NAD+
d) Pyruvate - Answers- a
In Mitochondria, exergonic redox reactions
a) are the source of energy driving prokaryotic ATP synthesis.
b) provide the energy that establishes the proton gradient
c) reduce carbon atoms to CO2
d) are coupled via phosphorylated intermediates to endergonic processes - Answers- b
Which is the oxidizing agent in the following reaction?
Pyruvate + NADH + H+ ->> Lactate + NAD+
a) oxygen
b) NADH
c) lactate
d) pyruvate - Answers- d
, When electrons flow along the electron transport chains of mitochondria, which of the
following changes occurs?
a) The pH of the matrix increases
b) ATP synthase pumps protons by active transport
c) The electrons gain free energy
d) NAD+ is oxidized - Answers- a
Most CO2 from catabolism is released during
a) Glycolysis
b) the citric acid cycle
c) Lactate Fermentation
d) Electron transport - Answers- b
The light reactions of photosynthesis supply the Calvin Cycle with
a) light energy
b) CO2 and ATP
c) H2O and NADPH
d) ATP and NADPH - Answers- d
Which father following sequences correctly represents the flow of electrons during
photosynthesis?
a) NADPH --> O2 --> CO2
b) H2O --> NADPH --> Calvin cycle
c) H2O --> Photosystem I ->> Photosystem II
d) NADPH --> electron transport chain --> O2 - Answers- b
How is photosynthesis similar in C4 plants and CAM plants?
a) In both cases, only Photosystem I is used
b) Both types of plants make sugar without the Calvin Cycle
c) In both cases, rubisco is not used to fix carbon initially
d) Both types of plants make most of their sugar in the dark - Answers- c
Which of the following statements is a correct distinction between autotrophs and
heterotrophs?
a) Autotrophs, but not heterotrophs, can nourish themselves
b) Only heterotrophs require chemical compounds from the environment
c) Cellular respiration is unique to heterotrophs
d) Only heterotrophs have mitochondria - Answers- a
Which of the following does not occur during the Calvin cycle?
Catabolism is to anabolism as ___________________ is to ___________________.
a.) exergonic; spontaneous
b.) exergonic; endergonic
c.) free energy; entropy
d.) work; energy - Answers- b
Most cells cannot harness heat to perform work because
a.) heat does not involve a transfer of energy.
b.) cells do not have much thermal energy; they are eventually cool.
c.) temperature is usually uniform throughout a cell.
d.) heat can never be used to do work. - Answers- c
Which of the following metabolic processes can occur without a net influx of energy
form some other process?
a.) ADP + P ->> ATP+H2O
b.) C6H12O6 + 6H2O ->> 6CO2 + 6H2O
c.) 6CO2 + 6H2O ->> C6H12O6 + 6H2O
d.) Amino Acids ->> Protein - Answers- b
The final electron acceptor of the electron transport chain that functions in aerobic
oxidative phosphorylation is
a) Oxygen
b) Water
c) NAD+
d) Pyruvate - Answers- a
In Mitochondria, exergonic redox reactions
a) are the source of energy driving prokaryotic ATP synthesis.
b) provide the energy that establishes the proton gradient
c) reduce carbon atoms to CO2
d) are coupled via phosphorylated intermediates to endergonic processes - Answers- b
Which is the oxidizing agent in the following reaction?
Pyruvate + NADH + H+ ->> Lactate + NAD+
a) oxygen
b) NADH
c) lactate
d) pyruvate - Answers- d
, When electrons flow along the electron transport chains of mitochondria, which of the
following changes occurs?
a) The pH of the matrix increases
b) ATP synthase pumps protons by active transport
c) The electrons gain free energy
d) NAD+ is oxidized - Answers- a
Most CO2 from catabolism is released during
a) Glycolysis
b) the citric acid cycle
c) Lactate Fermentation
d) Electron transport - Answers- b
The light reactions of photosynthesis supply the Calvin Cycle with
a) light energy
b) CO2 and ATP
c) H2O and NADPH
d) ATP and NADPH - Answers- d
Which father following sequences correctly represents the flow of electrons during
photosynthesis?
a) NADPH --> O2 --> CO2
b) H2O --> NADPH --> Calvin cycle
c) H2O --> Photosystem I ->> Photosystem II
d) NADPH --> electron transport chain --> O2 - Answers- b
How is photosynthesis similar in C4 plants and CAM plants?
a) In both cases, only Photosystem I is used
b) Both types of plants make sugar without the Calvin Cycle
c) In both cases, rubisco is not used to fix carbon initially
d) Both types of plants make most of their sugar in the dark - Answers- c
Which of the following statements is a correct distinction between autotrophs and
heterotrophs?
a) Autotrophs, but not heterotrophs, can nourish themselves
b) Only heterotrophs require chemical compounds from the environment
c) Cellular respiration is unique to heterotrophs
d) Only heterotrophs have mitochondria - Answers- a
Which of the following does not occur during the Calvin cycle?
