High School Biology : Cell Respiration
Study concepts, example questions & explanations for High School Biology
All High School Biology Resources
Example Questions
Example Question #1 : Understanding The Electron Transport Chain
The electron transport chain is responsible for generating the proton gradient that powers the production of ATP. To where do the proteins of the electron transport chain pump these protons?
The cytosol
The outer mitochondrial membrane
The mitochondrial matrix
The intermembrane space
The intermembrane space
As electrons move down the electron transport chain, protein pumps are provided the energy to pump protons into the intermembrane space of the mitochondrion.
The result is a high concentration of protons in the intermembrane space and a low concentration in the mitochondrial matrix. The difference in concentration and charge balance results in an electrochemical gradient, pulling protons into the mitochondrial matrix. ATP synthase is able to use this pulling force to activate enzymatic activity and generate ATP.
Example Question #1 : Understanding The Electron Transport Chain
Which of the following is not critical in ATP formation through aerobic respiration?
ATP synthase
Proton gradient
Double membrane
Lactic acid
Electron carriers
Lactic acid
This question primarily tests your knowledge of the Electron Transport Chain, which is responsible for the majority of ATP synthesis. The Electron Transport Chain relies on the delivery of electrons from electron carriers. ATP is formed through the movement of protons down their gradient through a ATP synthase protein. The formation of the proton gradient is accomplished via a double membrane in the mitochondria. Lactic Acid is not present in aerobic respiration, instead it is a derivative of fermentation.
Example Question #6 : Understanding The Electron Transport Chain
Which of the following is the final electron accepter of the electron transport chain?
ATP
Oxygen
Hydrogen
NADH
Oxygen
Molecular oxygen—
All High School Biology Resources
