Portage BIOD 101 Module 3 | Questions with 100% Verified
Answers | Latest Update 2026/2027
Question: T/F: If false, make the statement true: While ATP can be
generated in the absence of oxygen, the amount is minimal
relative to aerobic respiration
Answer: True
Question: Which of the following chemical reactions requires energy and
occurs when two or more monomers are joined together,
resulting in the loss of a water molecule and possibly other
small molecules?
Answer: Dehydration condensation reaction
Question: What is the purpose of the citric acid cycle?
Answer: The citric acid cycle (CAC), aka the Krebs cycle, generates high energy molecules
(NADH and FADH2) that will be later used to generate ATP in the Electron Transport
Chain (ETC)
Question: T/F: Anabolism refers to the sum of all synthetic energy-
requiring biochemical reactions.
Answer: True
Question: Which of the following is produced during Reaction 1 of the
CAC?
Answer: Citrate
Question: hexokinase
Answer: Facilitates transfer of inorganic phosphate from ATP to glucose
Question: Phosphoglucoisomerase
Answer: Converts G6P into fructose 6-phosphate
Question: Phosphofructokinase
Answer: Transfers ATP phosphate group to opposite end of fructose 6-phosphate
Question: Aldolase
Answer: Cleaves fructose 1,6-biphosphate
Question: T/F: The electron transport chain directly produces ATP.
Answer: False; the ETC does not directly produce any ATP. However, establishing a proton
gradient across the mitochondrial membrane will lead to the production of ATP via ATP
synthase.
, Question: Fill-in-the-blank: _______ respiration involves the consumption of
oxygen, while ______ respiration can proceed in the absence of
oxygen.
Answer: Aerobic; anaerobic
Question: The first step of the Citric Acid Cycle is a preparation phase
sometimes simply called __________.
Answer: Pyruvate oxidation
Question: Which of the following is an electron transport in the ETC?
Answer: Oxygen, Cytochromes, Ubiquinone
Question: Where does the entire process of glycolysis occur in the cell?
Answer: Cytoplasm
Question: In reaction 8 of the CAC, _________ is oxidized, and another
NAD+ is reduced to NADH.
Answer: Malate
Question: What role does ATP synthase play in the ETC?
Answer: ATP synthase is responsible for generating ATP through chemiosmosis.
Question: The energy payoff phase is also known as an __________ reaction
because energy is released in this biochemical reaction.
Answer: exergonic
Question: Which of the following Citric Acid Cycle reactions involves
hydrolysis of fumarate to form malate?
Answer: Reaction 7
Question: Complex 1 of the electron transport chain is often referred to
as a _________, which is a specialized protein usually found in
mitochondria.
Answer: flavoprotein
Question: The reactions of the Citric Acid Cycle occur in what part of the
cell?
Answer: Mitochondria
Question: T/F: The catalytic knob is the stationary piece of ATP synthase
that is anchored into the lipid bilayer.
Answer: False; The stator is the stationary piece of ATP synthase that is anchored into the lipid
bilayer.
Answers | Latest Update 2026/2027
Question: T/F: If false, make the statement true: While ATP can be
generated in the absence of oxygen, the amount is minimal
relative to aerobic respiration
Answer: True
Question: Which of the following chemical reactions requires energy and
occurs when two or more monomers are joined together,
resulting in the loss of a water molecule and possibly other
small molecules?
Answer: Dehydration condensation reaction
Question: What is the purpose of the citric acid cycle?
Answer: The citric acid cycle (CAC), aka the Krebs cycle, generates high energy molecules
(NADH and FADH2) that will be later used to generate ATP in the Electron Transport
Chain (ETC)
Question: T/F: Anabolism refers to the sum of all synthetic energy-
requiring biochemical reactions.
Answer: True
Question: Which of the following is produced during Reaction 1 of the
CAC?
Answer: Citrate
Question: hexokinase
Answer: Facilitates transfer of inorganic phosphate from ATP to glucose
Question: Phosphoglucoisomerase
Answer: Converts G6P into fructose 6-phosphate
Question: Phosphofructokinase
Answer: Transfers ATP phosphate group to opposite end of fructose 6-phosphate
Question: Aldolase
Answer: Cleaves fructose 1,6-biphosphate
Question: T/F: The electron transport chain directly produces ATP.
Answer: False; the ETC does not directly produce any ATP. However, establishing a proton
gradient across the mitochondrial membrane will lead to the production of ATP via ATP
synthase.
, Question: Fill-in-the-blank: _______ respiration involves the consumption of
oxygen, while ______ respiration can proceed in the absence of
oxygen.
Answer: Aerobic; anaerobic
Question: The first step of the Citric Acid Cycle is a preparation phase
sometimes simply called __________.
Answer: Pyruvate oxidation
Question: Which of the following is an electron transport in the ETC?
Answer: Oxygen, Cytochromes, Ubiquinone
Question: Where does the entire process of glycolysis occur in the cell?
Answer: Cytoplasm
Question: In reaction 8 of the CAC, _________ is oxidized, and another
NAD+ is reduced to NADH.
Answer: Malate
Question: What role does ATP synthase play in the ETC?
Answer: ATP synthase is responsible for generating ATP through chemiosmosis.
Question: The energy payoff phase is also known as an __________ reaction
because energy is released in this biochemical reaction.
Answer: exergonic
Question: Which of the following Citric Acid Cycle reactions involves
hydrolysis of fumarate to form malate?
Answer: Reaction 7
Question: Complex 1 of the electron transport chain is often referred to
as a _________, which is a specialized protein usually found in
mitochondria.
Answer: flavoprotein
Question: The reactions of the Citric Acid Cycle occur in what part of the
cell?
Answer: Mitochondria
Question: T/F: The catalytic knob is the stationary piece of ATP synthase
that is anchored into the lipid bilayer.
Answer: False; The stator is the stationary piece of ATP synthase that is anchored into the lipid
bilayer.
