bio 1404 Exam Questions with Correct
Verified Answers
two major phases of glycolysis - ANSWER energy investment and energy payoff
Glycolysis - ANSWER beraks down glucose into TWO molecules of PYRUVATE
Can glycolysis occur without oxygen? - ANSWER Yes
In the energy investment phase of glycolysis, are ATP molecules used or formed and how
many are there? - ANSWER TWO molecules of ATP are USED.
In the energy pay off phase of glycolysis, are ATP molecules used or formed and how many
are there? - ANSWER FOUR molecules of ATP are FORMED.
Is carbon dioxide produced in glycolysis? - ANSWER No
What are the results of glycolysis - ANSWER 2 molecules of pyruvate, 2 ATP, 2 NADH
Where are the results of glycolysis generated? - ANSWER via substrate level phosphorylation
Where does pyruvate oxidation take place? - ANSWER mitochondrial matrix
What does pyruvate oxidation generate? - ANSWER 2 NADH and 2 CO2 per glucose (or
2 pyruvate)
Pyruvate oxidation function - ANSWER Completes the break down of pyruvate to CO2
,Carbon dioxide (CO2) is released during which of the following stages of cellular respiration?
- ANSWER oxidation of pyruvate to acetyl CoA and the citric acid cycle
Where does the citric acid cycle occur? - ANSWER In the mitochondrial matrix
What does the citric acid cycle produce? - ANSWER 2 CO2, 1 GTP(ATP), 3 NADH , 1 FADH2, but it
happens twice so multiple each by two.
After glycolysis and the Krebs cycle but before going to the reactions on mitochondrial
inner membrane, the C backbone of glucose is broken down to CO2 and some ATP. Most of
the energy at this point is in the form of - ANSWER NADH
NADH and FADH2 are - ANSWER electron carries that donate electrons to the ETC,
which powers ATP synthesis via oxidative phosphorylation.
The electron transport chain is located - ANSWER in the innermembrane of the mitochondrion.
(cristae)
The final electron accepter of in the ETC - ANSWER Oxygen
In the ETC, oxygen forms - ANSWER H2O
oxidative phosphorylation occurs where - ANSWER in the mitochondrial inner membrane
H+ protons are pumped fom the mitochondrial matrix to the - ANSWER intermembrane space
H+ move back across the membrane passing through a protein complex called - ANSWER ATP
synthase
, ATP synthase - ANSWER uses the exergonic flow of H+ to drive phosphorylation of ATP
an example of chemiosmosis - ANSWER the use of energy in a H+ gradient to drive cellular work
other gradients to know - ANSWER concentration gradient
redox(charge) gradient
pH gradient due to H+
The energy stored in a H+ gradient across a membrane couples the redox reactions of
the electron transport chain to - ANSWER ATP synthesis
The H+ gradient is referred to as a - ANSWER proton-motive force, emphasizing its capacity to
do work
The energetic electron, taken from glucose or a breakdown product of glucose, is stripped of its
energy to - ANSWER actively transport H into the intermembrane
space
During cellular respiration, most energy flows in this sequence - ANSWER glucose -> NADH ->
ETC -> proton-motive force -> ATP
Approximately 2.5 ATPs are synthesized by each e- pair donated by - ANSWER one NADH
molecule
1.5 ATPs are synthesized by each e- pair donated by - ANSWER one FADH2 molecule
Electrons from the oxidation of FADH2 enter the ETC at what complex? - ANSWER 2
NADH enter the ETC at what complex? - ANSWER 1
Verified Answers
two major phases of glycolysis - ANSWER energy investment and energy payoff
Glycolysis - ANSWER beraks down glucose into TWO molecules of PYRUVATE
Can glycolysis occur without oxygen? - ANSWER Yes
In the energy investment phase of glycolysis, are ATP molecules used or formed and how
many are there? - ANSWER TWO molecules of ATP are USED.
In the energy pay off phase of glycolysis, are ATP molecules used or formed and how many
are there? - ANSWER FOUR molecules of ATP are FORMED.
Is carbon dioxide produced in glycolysis? - ANSWER No
What are the results of glycolysis - ANSWER 2 molecules of pyruvate, 2 ATP, 2 NADH
Where are the results of glycolysis generated? - ANSWER via substrate level phosphorylation
Where does pyruvate oxidation take place? - ANSWER mitochondrial matrix
What does pyruvate oxidation generate? - ANSWER 2 NADH and 2 CO2 per glucose (or
2 pyruvate)
Pyruvate oxidation function - ANSWER Completes the break down of pyruvate to CO2
,Carbon dioxide (CO2) is released during which of the following stages of cellular respiration?
- ANSWER oxidation of pyruvate to acetyl CoA and the citric acid cycle
Where does the citric acid cycle occur? - ANSWER In the mitochondrial matrix
What does the citric acid cycle produce? - ANSWER 2 CO2, 1 GTP(ATP), 3 NADH , 1 FADH2, but it
happens twice so multiple each by two.
After glycolysis and the Krebs cycle but before going to the reactions on mitochondrial
inner membrane, the C backbone of glucose is broken down to CO2 and some ATP. Most of
the energy at this point is in the form of - ANSWER NADH
NADH and FADH2 are - ANSWER electron carries that donate electrons to the ETC,
which powers ATP synthesis via oxidative phosphorylation.
The electron transport chain is located - ANSWER in the innermembrane of the mitochondrion.
(cristae)
The final electron accepter of in the ETC - ANSWER Oxygen
In the ETC, oxygen forms - ANSWER H2O
oxidative phosphorylation occurs where - ANSWER in the mitochondrial inner membrane
H+ protons are pumped fom the mitochondrial matrix to the - ANSWER intermembrane space
H+ move back across the membrane passing through a protein complex called - ANSWER ATP
synthase
, ATP synthase - ANSWER uses the exergonic flow of H+ to drive phosphorylation of ATP
an example of chemiosmosis - ANSWER the use of energy in a H+ gradient to drive cellular work
other gradients to know - ANSWER concentration gradient
redox(charge) gradient
pH gradient due to H+
The energy stored in a H+ gradient across a membrane couples the redox reactions of
the electron transport chain to - ANSWER ATP synthesis
The H+ gradient is referred to as a - ANSWER proton-motive force, emphasizing its capacity to
do work
The energetic electron, taken from glucose or a breakdown product of glucose, is stripped of its
energy to - ANSWER actively transport H into the intermembrane
space
During cellular respiration, most energy flows in this sequence - ANSWER glucose -> NADH ->
ETC -> proton-motive force -> ATP
Approximately 2.5 ATPs are synthesized by each e- pair donated by - ANSWER one NADH
molecule
1.5 ATPs are synthesized by each e- pair donated by - ANSWER one FADH2 molecule
Electrons from the oxidation of FADH2 enter the ETC at what complex? - ANSWER 2
NADH enter the ETC at what complex? - ANSWER 1
