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Quiz 4 – Pathways of cellular respiration
What material(s) are put into the Krebs Cycle?
FADH2
NADH
ATP
carbon dioxide
acetyl groups
The order of the major pathways and reactions of cellular respiration is
glycolysis-electron transport chain-preparatory reaction-Krebs cycle.
Krebs cycle-glycolysis-preparatory reaction-electron transport chain.
glycolysis-preparatory reaction-Krebs cycle electron transport chain.
electron transport chain-glycolysis-preparatory reaction-Krebs cycle.
glycolysis-preparatory reaction-Krebs cycle-electron transport chain.
What would be the immediate result if the hydrogen ion concentration in the intermembrane space and the matrix reached equilibrium?
The conversion of FAD to FADH2 would stop.
Most ATP production would stop.
Glycolysis and the Krebs cycle would stop.
Most ATP production would increase.
The conversion of NAD+ to NADH would stop.
What role does oxygen play in cellular respiration?
It acts as an input for the Krebs cycle.
It acts as a coenzyme in the electron transport chain.
It acts as an intermediate between glycolysis and the Krebs cycle.
It acts as an input for glycolysis.
It acts as the final electron acceptor in the electron transport chain
Which part of cellular respiration produces the greatest amount of ATP?
Krebs cycle
electron transport chain
preparatory reaction
fermentation
glycolysis
Which of the following phases takes place entirely outside the mitochondria and is considered to be anaerobic?
Krebs cycle
preparatory reaction
electron transport chain
chemiosmosis
glycolysis
In which of the following events of cellular respiration is no ATP produced?
chemiosmosis
preparatory reaction
electron transport chain
Krebs cycle
Glycolysis
When an enzyme is used to convert ADP into ATP it is referred to as
enzyme ATP synthesis.
active site ATP synthesis.
substrate-level ATP synthesis.
enzyme ADP synthesis.
substrate-level ADP synthesis.
One molecule has gone through glycolysis and the preparatory reaction. The net number of ATP molecules produced so far is
one.
two.
zero.
six.
36 or 38.
The best fat burning exercise would be
short and aerobic.
watching television.
long and anaerobic.
short and anaerobic.
long and aerobic.
Once NADH and FADH2 have delivered their electrons and hydrogen ions to the electron transport chain, they
pick up more hydrogen ions.
pick up water molecules.
pick up oxygen molecules.
are shipped out of the mitochondria to be used by other organelles.
pick up carbon dioxide molecules.
Of the following statements, which is true in common for proteins, carbohydrates, and lipids as they are catabolized?
They all produce the same amount of energy.
They all undergo the electron transport chain.
They all undergo the preparatory reaction.
They all undergo glycolysis.
They all need carbon dioxide to be broken down.
Which of the following statements is true about fermentation?
It occurs without oxygen.
It is very efficient.
It produces more ATP then cellular respiration with oxygen.
It produces pyruvate as its end product.
It doesn’t need enzymes.
What is the significance of the cristae in the mitochondria?
increase surface area, therefore increasing the Krebs cycle
increase surface area, therefore increasing the preparatory reaction
increase surface area, therefore increasing fermentation
increase surface area, therefore increasing the electron transport chain
increase surface area, therefore increasing glycolysis
What role do NADH and FADH2 play in the process of cellular respiration?
They carry electrons to the electron transport chain.
They oxidize pyruvate.
They assist in making acetyl groups.
They produce ATP.
They help break down glucose.
Which of the following is a product of a part of metabolism other than the electron transport chain in cellular respiration?
water
oxygen
FAD
NAD+
ATP
Which of these is an inaccurate description of the preparatory reaction?
The reaction occurs once per glucose molecule.
NAD+ is converted to NADH.
Carbon dioxide is given off.
It connects glycolysis to the Krebs cycle.
Pyruvate is converted to a two-carbon acetyl group.
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