BIO 172 Quiz 12 Questions with All
Correct Answers
Which of the following is not found in chloroplasts?
A) Thylakoid membrane
B) Inner membrane
C) Stroma
D) Cristae - Answer-D) Cristae
What do the light dependent reactions of photosynthesis produce?
A) G3P
B) RuBP
C) Glucose
D) ATP and NADPH - Answer-D) ATP and NADPH
A step in the citric acid cycle is shown below.
Malate + NAD+ ⟶ Oxaloacetate + NADH + H+
Which statement is FALSE regarding the reaction?
A) Oxaloacetate has a higher free energy than malate
B) NADH has a higher free energy than NAD+
C) The conversion of malate to oxaloacetate provides the necessary energy to drive the
reaction forward
D) The reaction has a negative delta G
E) Malate is oxidized to oxaloacetate - Answer-A) Oxaloacetate has a higher free
energy than malate
Hexokinase converts glucose to glucose-6-phosphate during one of the first steps in
glycolysis. ATP is required for this reaction and hexokinase is inhibited by the
immediate product of its reaction. Given this information, what can you say is TRUE
about hexokinase?
A) Hexokinase is competitively inhibited by glucose
B) Hexokinase is feedback inhibited by glucose-6-phosphate
C) Hexokinase is feedback inhibited by ATP
D) Hexokinase is allosterically inhibited by ATP
E) Hexokinase is allosterically inhibited by glucose - Answer-B) Hexokinase is feedback
inhibited by glucose-6-phosphate
Which statement about chemiosmosis is not true?
A) Protons return to the matrix through the membrane by way of ATP synthase
B) Protons flow across the inner mitochondrial membrane
, C) Proton pumping is associated with the electron transport chain
D) ATP is required for the protons to return to the matrix - Answer-D) ATP is required for
the protons to return to the matrix
Which of the following molecules contains the most potential energy?
A) G3P
B) ATP
C) Pyruvate
D) NADH
E) FADH2 - Answer-A) G3P
Which organisms are capable of photosynthesis?
A) Only some animals
B) Only a few species of bacteria
C) Only algae
D) Both some bacteria and some algae - Answer-D) Both some bacteria and some
algae
Which of the following best describes the electron transport chain?
A) Pyruvate is oxidized to acetyl CoA
B) Electrons are passed from one carrier to another, releasing a little energy at each
step
C) Protons move by chemiosmosis through ATP synthase
D) Electrons are pumped across a membrane by active transport - Answer-B) Electrons
are passed from one carrier to another, releasing a little energy at each step
The potential energy in a molecule of ATP that can be used in an enzymatic reaction is
held in the:
A) Carbon-carbon bonds of the ribose sugar
B) Repulsion of the phosphate groups from each other
C) Carbon-oxygen bonds of the sugar
D) Carbon-nitrogen bonds of the base
E) Repulsion of the sugar and the base - Answer-B) Repulsion of the phosphate groups
from each other
During lactic acid fermentation, pyruvate:
A) loses electrons and is a reducing agent
B) gains electrons and is an oxidizing agent
C) shares electrons with water and is an oxidizing agent
D) loses electrons and is an oxidizing agent
E) gains electrons and is a reducing agent - Answer-B) gains electrons and is an
oxidizing agent
Which of the following is a product of the Calvin cycle?
A) Carbon Dioxide
B) NADP+
Correct Answers
Which of the following is not found in chloroplasts?
A) Thylakoid membrane
B) Inner membrane
C) Stroma
D) Cristae - Answer-D) Cristae
What do the light dependent reactions of photosynthesis produce?
A) G3P
B) RuBP
C) Glucose
D) ATP and NADPH - Answer-D) ATP and NADPH
A step in the citric acid cycle is shown below.
Malate + NAD+ ⟶ Oxaloacetate + NADH + H+
Which statement is FALSE regarding the reaction?
A) Oxaloacetate has a higher free energy than malate
B) NADH has a higher free energy than NAD+
C) The conversion of malate to oxaloacetate provides the necessary energy to drive the
reaction forward
D) The reaction has a negative delta G
E) Malate is oxidized to oxaloacetate - Answer-A) Oxaloacetate has a higher free
energy than malate
Hexokinase converts glucose to glucose-6-phosphate during one of the first steps in
glycolysis. ATP is required for this reaction and hexokinase is inhibited by the
immediate product of its reaction. Given this information, what can you say is TRUE
about hexokinase?
A) Hexokinase is competitively inhibited by glucose
B) Hexokinase is feedback inhibited by glucose-6-phosphate
C) Hexokinase is feedback inhibited by ATP
D) Hexokinase is allosterically inhibited by ATP
E) Hexokinase is allosterically inhibited by glucose - Answer-B) Hexokinase is feedback
inhibited by glucose-6-phosphate
Which statement about chemiosmosis is not true?
A) Protons return to the matrix through the membrane by way of ATP synthase
B) Protons flow across the inner mitochondrial membrane
, C) Proton pumping is associated with the electron transport chain
D) ATP is required for the protons to return to the matrix - Answer-D) ATP is required for
the protons to return to the matrix
Which of the following molecules contains the most potential energy?
A) G3P
B) ATP
C) Pyruvate
D) NADH
E) FADH2 - Answer-A) G3P
Which organisms are capable of photosynthesis?
A) Only some animals
B) Only a few species of bacteria
C) Only algae
D) Both some bacteria and some algae - Answer-D) Both some bacteria and some
algae
Which of the following best describes the electron transport chain?
A) Pyruvate is oxidized to acetyl CoA
B) Electrons are passed from one carrier to another, releasing a little energy at each
step
C) Protons move by chemiosmosis through ATP synthase
D) Electrons are pumped across a membrane by active transport - Answer-B) Electrons
are passed from one carrier to another, releasing a little energy at each step
The potential energy in a molecule of ATP that can be used in an enzymatic reaction is
held in the:
A) Carbon-carbon bonds of the ribose sugar
B) Repulsion of the phosphate groups from each other
C) Carbon-oxygen bonds of the sugar
D) Carbon-nitrogen bonds of the base
E) Repulsion of the sugar and the base - Answer-B) Repulsion of the phosphate groups
from each other
During lactic acid fermentation, pyruvate:
A) loses electrons and is a reducing agent
B) gains electrons and is an oxidizing agent
C) shares electrons with water and is an oxidizing agent
D) loses electrons and is an oxidizing agent
E) gains electrons and is a reducing agent - Answer-B) gains electrons and is an
oxidizing agent
Which of the following is a product of the Calvin cycle?
A) Carbon Dioxide
B) NADP+
