bio 1404 Exam Questions with Correct Verified Answers
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Course
Bio 1404
Institution
Bio 1404
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 th...
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
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