All GRE Subject Test: Biology Resources
Example Questions
Example Question #1 : Cell Metabolism
Where does glycolysis occur in the cell?
Inner mitochondrial membrane
Cytosol
Intermembrane space
Mitochondrial matrix
Cytosol
Glycolysis is the first step of aerobic respiration and takes place in the cytosol of the cell. The products of glycolysis (pyruvate and NADH) are transported into the mitochondria to continue the respiration processes. The Krebs cycle takes place in the mitochondrial matrix. The proteins of the electron transport chain are situated in the inner mitochondrial membrane, generating the proton gradient across this membrane by expelling protons into the intermembrane space.
Example Question #2 : Cell Metabolism
Which of the following products is not created during glycolysis?
FADH2
Pyruvate
ATP
NADH
FADH2
Glycolysis is the first step of both aerobic and anaerobic cellular respiration. It results in the formation of two molecules of NADH, ATP, and pyruvate. FADH2 is not produced until the Krebs (citric acid) cycle.
Example Question #3 : Cell Metabolism
What is the net production of ATP in glycolysis?
While four ATP are produced during glycolysis, two are also consumed in the process. This results in a net production of two molecules of ATP. Additionally two of the high energy intermediates NADH are produced for each molecule of glucose during glycolysis.
Example Question #1 : Cell Metabolism
For each molecule of glucose that enters glycolysis __________ molecules of __________ are produced.
one . . . pyruvate
two . . . acetyl-CoA
two . . . pyruvate
two . . . lactate
two . . . alanine
two . . . pyruvate
For each molecule of glucose entering into glycolysis, there is a resulting two molecules of pyruvate. Glucose is a 6-carbon molecule and pyruvate is a 3-carbon molecule. No carbon is gained or lost in this stage of energy production.
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