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Questions and Answers
Which molecule forms first during the citric acid cycle?
Which molecule forms first during the citric acid cycle?
- Pyruvate
- Acetyl CoA
- Citrate (correct)
- Tri-carboxylic acid
What is another name for the citric acid cycle due to the three carboxyl groups on its first two intermediates?
What is another name for the citric acid cycle due to the three carboxyl groups on its first two intermediates?
- Acetyl CoA cycle
- Citrate cycle
- Tri-carboxylic acid cycle (correct)
- Pyruvate cycle
Who is the discoverer of the citric acid cycle?
Who is the discoverer of the citric acid cycle?
- FADH
- Hans Krebs (correct)
- NADH
- Citrate
Where does the citric acid cycle take place in eukaryotic cells?
Where does the citric acid cycle take place in eukaryotic cells?
What is the starting material for the citric acid cycle?
What is the starting material for the citric acid cycle?
What do the reduced electron carriers NADH and FADH generated in the TCA cycle pass their electrons into?
What do the reduced electron carriers NADH and FADH generated in the TCA cycle pass their electrons into?
Which molecule combines with oxaloacetate in the first step of the citric acid cycle?
Which molecule combines with oxaloacetate in the first step of the citric acid cycle?
How many carbon dioxide molecules are released in the first two steps of the citric acid cycle?
How many carbon dioxide molecules are released in the first two steps of the citric acid cycle?
Which enzyme catalyzes the third step of the citric acid cycle?
Which enzyme catalyzes the third step of the citric acid cycle?
What is the result of the fourth step in the citric acid cycle?
What is the result of the fourth step in the citric acid cycle?
Which molecule is reduced to form FADH2 in the citric acid cycle?
Which molecule is reduced to form FADH2 in the citric acid cycle?
How many ATP or GTP molecules are produced per turn of the citric acid cycle?
How many ATP or GTP molecules are produced per turn of the citric acid cycle?
What happens to oxaloacetate at the end of one turn of the citric acid cycle?
What happens to oxaloacetate at the end of one turn of the citric acid cycle?
How many pyruvate molecules are made per glucose in cellular respiration?
How many pyruvate molecules are made per glucose in cellular respiration?
What is the main function of the citric acid cycle in cellular respiration?
What is the main function of the citric acid cycle in cellular respiration?
What is the purpose of the quick rearrangement that occurs after citrate is formed in the first step of the citric acid cycle?
What is the purpose of the quick rearrangement that occurs after citrate is formed in the first step of the citric acid cycle?
The citric acid cycle is also known as the TCA cycle, which stands for tri-carboxylic acid cycle.
The citric acid cycle is also known as the TCA cycle, which stands for tri-carboxylic acid cycle.
The citric acid cycle occurs in the cytoplasm of eukaryotic cells.
The citric acid cycle occurs in the cytoplasm of eukaryotic cells.
The primary starting material for the citric acid cycle is acetyl CoA, which is derived from the oxidation of glucose.
The primary starting material for the citric acid cycle is acetyl CoA, which is derived from the oxidation of glucose.
The citric acid cycle harvests most of its bond energy in the form of NADH, FADH, and ADP molecules.
The citric acid cycle harvests most of its bond energy in the form of NADH, FADH, and ADP molecules.
The reduced electron carriers NADH and FADH generated in the TCA cycle directly generate most of the ATP produced in cellular respiration.
The reduced electron carriers NADH and FADH generated in the TCA cycle directly generate most of the ATP produced in cellular respiration.
The citric acid cycle is a peripheral process in cellular respiration and does not play a central role.
The citric acid cycle is a peripheral process in cellular respiration and does not play a central role.
The citric acid cycle is an open loop process.
The citric acid cycle is an open loop process.
The molecule oxaloacetate combines with acetyl CoA to form a six-carbon molecule called citrate.
The molecule oxaloacetate combines with acetyl CoA to form a six-carbon molecule called citrate.
The citric acid cycle releases three NADH molecules and one FADH2 molecule per turn for each molecule of glucose that enters cellular respiration.
The citric acid cycle releases three NADH molecules and one FADH2 molecule per turn for each molecule of glucose that enters cellular respiration.
The enzyme catalyzing the third step of the citric acid cycle is important in regulating the speed of the cycle.
The enzyme catalyzing the third step of the citric acid cycle is important in regulating the speed of the cycle.
The citric acid cycle goes around twice for each pyruvate made per glucose.
The citric acid cycle goes around twice for each pyruvate made per glucose.
Oxaloacetate is regenerated at the end of one turn of the citric acid cycle.
Oxaloacetate is regenerated at the end of one turn of the citric acid cycle.
The citric acid cycle takes place in the cytoplasm of eukaryotic cells.
The citric acid cycle takes place in the cytoplasm of eukaryotic cells.
The citric acid cycle produces two carbon dioxide molecules in the first step and one carbon dioxide molecule in the second step.
The citric acid cycle produces two carbon dioxide molecules in the first step and one carbon dioxide molecule in the second step.
Isocitrate dehydrogenase catalyzes the conversion of citrate to its isomer, isocitrate.
Isocitrate dehydrogenase catalyzes the conversion of citrate to its isomer, isocitrate.
Acetyl CoA joins with a five-carbon molecule to form a six-carbon molecule called citrate in the first step of the citric acid cycle.
Acetyl CoA joins with a five-carbon molecule to form a six-carbon molecule called citrate in the first step of the citric acid cycle.
