Cycle Starters
This two-carbon molecule combines with oxaloacetate to start the Krebs cycle.
What is acetyl-CoA?
How many molecules of direct ATP are produced in one cycle turn.
What is 1 ATP?
This cycle works closely with glycolysis to produce energy for the cell.
What is the Krebs cycle?
Each turn of the Krebs cycle releases this many molecules of CO₂.
What is 2?
The Krebs cycle is also known by this alternate name.
What is the citric acid cycle?
This four-carbon molecule is the first to react with acetyl-CoA, forming citrate.
What is oxaloacetate?
This many NADH molecules are produced in one turn of the Krebs cycle.
What is 3 NADH?
The Krebs cycle produces this molecule that transports high-energy electrons to the electron transport chain.
What is NADH?
This is the number of carbon atoms in acetyl-CoA, the molecule that enters the Krebs cycle.
What is 2?
The Krebs cycle occurs in this cellular organelle.
What is the mitochondrion?
The first product of the Krebs cycle is this six-carbon molecule.
What is citrate?
This is the total number of high-energy molecules (NADH, FADH₂, and ATP) produced per turn.
What is 10?
The two-carbon molecule that enters the Krebs cycle is formed from this molecule at the end of glycolysis.
What is pyruvate?
At the end of the Krebs cycle, this four-carbon molecule is regenerated to start the cycle again.
What is oxaloacetate?
This gas is a crucial component for the overall process of cellular respiration, although not directly used in the Krebs cycle itself.
What is oxygen?
This high-energy molecule, produced in glycolysis, must be converted to enter the Krebs cycle.
What is pyruvate?
Including the two pyruvates produced from one glucose, this many total NADH molecules are produced in two Krebs cycle turns.
What is 6 NADH?
The energy produced by the Krebs cycle is mainly used to make ATP in this final stage of cellular respiration.
What is the electron transport chain?
When acetyl-CoA combines with oxaloacetate, they form this six-carbon molecule at the beginning of the cycle.
What is citrate?
The Krebs cycle contributes to this phase of metabolism, which breaks down molecules to release energy.
What is catabolism?
This enzyme catalyzes the combination of acetyl-CoA and oxaloacetate.
What is citrate synthase?
This high-energy molecule is produced when succinate is converted to fumarate.
What is FADH₂?
The Krebs cycle releases carbon dioxide as a byproduct. Plants use this carbon dioxide in this process.
What is photosynthesis?
This five-carbon molecule forms halfway through the cycle before it’s converted into a four-carbon molecule.
What is alpha-ketoglutarate?
The Krebs cycle was discovered by this scientist, after whom it is named.
Who is Hans Krebs?