BIOL 1201 EXAMS: LATEST A+ GUIDE WITH ESSENTIAL
QUESTIONS AND ANSWERS
Which molecule is metabolized in a cell to produce energy for performing work?
glucose
True or false? The potential energy in an ATP molecule is derived mainly from its three
phosphate groups.
True
Which processes are part of the cellular respiration pathway that produces large amounts of
ATP in a cell?
Glycolysis, Citric Acid Cycle, Electron Transport
Which step of the cellular respiration pathway can take place in the absence of oxygen?
Glycolysis
Into which molecule are all the carbon atoms in glucose ultimately incorporated during
cellular respiration?
Carbon dioxide
How many molecules of carbon are used to form carbon dioxide as pyruvate is converted to
acetyl CoA?
2
How many molecules of carbon are used to form carbon dioxide during the Krebs cycle.
4
The electrons lose energy as they move down the ____, and this energy is used to create a
proton gradient that drives the synthesis of ATP. NADH and FADH2 donate their electrons to
____as well.
electron transport chain
Which stage of glucose metabolism produces the most ATP?
Electron transport and chemiosmosis
True or false? The reactions that generate the largest amounts of ATP during cellular
respiration take place in the mitochondria.
True
, Where does glycolysis take place?
cytoplasm
The Krebs cycle and the electron transport chain, which generate the largest amounts of ____
during cellular respiration, take place in the ____.
ATP, mitochondria
Which molecule contains more energy?
Glucose
Where is majority of a cell's ATP produced?
mitochondria
Where in the mitochondrion is majority of the ATP produced?
ATP synthase
The synthesis of ATP is endergonic (requires energy) Where does this energy come from?
Hydrogen ions
ow is they hydrogen ion gradient maintained?
• Active transport of Hydrogen ions powered by the flow of electrons on the ETC
To continue to pump Hydrogen ions there must ba continuous flow of electrons along the ET.
What has to the electrons as it reaches the end of the ETC?
The electrons combine with oxygen.
• Uses the exergonic flow of electrons from food (glucose) to oxygen to drive the endergonic
synthesis of ATP.
• Electron Transport Chain and ATP Synthase
• Chemiosmosis
oxidative level
• Direct transfer of phosphate to ADP from an organic molecule with a high energy phosphate
bond
substrate level
Where does the Acetyl-CoA come from?
pyruvic acid
Where does the Pyruvic Acid come from?
QUESTIONS AND ANSWERS
Which molecule is metabolized in a cell to produce energy for performing work?
glucose
True or false? The potential energy in an ATP molecule is derived mainly from its three
phosphate groups.
True
Which processes are part of the cellular respiration pathway that produces large amounts of
ATP in a cell?
Glycolysis, Citric Acid Cycle, Electron Transport
Which step of the cellular respiration pathway can take place in the absence of oxygen?
Glycolysis
Into which molecule are all the carbon atoms in glucose ultimately incorporated during
cellular respiration?
Carbon dioxide
How many molecules of carbon are used to form carbon dioxide as pyruvate is converted to
acetyl CoA?
2
How many molecules of carbon are used to form carbon dioxide during the Krebs cycle.
4
The electrons lose energy as they move down the ____, and this energy is used to create a
proton gradient that drives the synthesis of ATP. NADH and FADH2 donate their electrons to
____as well.
electron transport chain
Which stage of glucose metabolism produces the most ATP?
Electron transport and chemiosmosis
True or false? The reactions that generate the largest amounts of ATP during cellular
respiration take place in the mitochondria.
True
, Where does glycolysis take place?
cytoplasm
The Krebs cycle and the electron transport chain, which generate the largest amounts of ____
during cellular respiration, take place in the ____.
ATP, mitochondria
Which molecule contains more energy?
Glucose
Where is majority of a cell's ATP produced?
mitochondria
Where in the mitochondrion is majority of the ATP produced?
ATP synthase
The synthesis of ATP is endergonic (requires energy) Where does this energy come from?
Hydrogen ions
ow is they hydrogen ion gradient maintained?
• Active transport of Hydrogen ions powered by the flow of electrons on the ETC
To continue to pump Hydrogen ions there must ba continuous flow of electrons along the ET.
What has to the electrons as it reaches the end of the ETC?
The electrons combine with oxygen.
• Uses the exergonic flow of electrons from food (glucose) to oxygen to drive the endergonic
synthesis of ATP.
• Electron Transport Chain and ATP Synthase
• Chemiosmosis
oxidative level
• Direct transfer of phosphate to ADP from an organic molecule with a high energy phosphate
bond
substrate level
Where does the Acetyl-CoA come from?
pyruvic acid
Where does the Pyruvic Acid come from?
