
Concept explainers
(a)
Interpretation:
The product formed from NADH in the electron transport chain should be determined.
Concept Introduction:
Aerobic respiration occurs in two steps;
- Glycolysis
- Citric acid cycle
In the presence of oxygen means aerobic respiration, this pyruvate enters in the Krebs cycle and extracts energy in the form of electrons transfer. Electrons are transferred from the pyruvate to the receptors like

Answer to Problem 56P
NADH produces two ATPs for every NADH2 molecule.
Explanation of Solution
Citric acid cycle is also known as tricarboxylic acid cycle or Krebs cycles. In this cycle all intermediates are carboxylate anions mainly which are formed from di or tricarboxylic acid during the reaction. It initiates with the reaction of acetyl CoA (a 2 C's substance) that reacts with a 4 C's substance to form a product of 6 C's. Later carbon atoms are removed in the form of carbon dioxide gas.
In this process, 2 H's are transferred to FAD and produces FADH2. This energy carrier remains attached to the enzyme and transfers the electrons to the electron transport chain. The electron transport chain is a series of four enzyme complexes and two coenzymes:
- Complex I to Complex IV
- Coenzymes -ubiquinone and Cytochrome c
(b)
Interpretation:
The product formed from
Concept Introduction:
Aerobic respiration occurs in two steps;
- Glycolysis
- Citric acid cycle
In the presence of oxygen means aerobic respiration, this pyruvate enters in the Krebs cycle and extracts energy in the form of electrons transfer. Electrons are transferred from the pyruvate to the receptors like

Answer to Problem 56P
The
Explanation of Solution
Citric acid cycle is also known as tricarboxylic acid cycle or Krebs cycles. In this cycle all intermediates are carboxylate anions mainly which are formed from di or tricarboxylic acid during the reaction. It initiates with the reaction of acetyl CoA (a 2 C's substance) that reacts with a 4 C's substance to form a product of 6 C's. Later carbon atoms are removed in the form of carbon dioxide gas.
In this process, 2 H's are transferred to FAD and produces FADH2. This energy carrier remains attached to the enzyme and transfers the electrons to the electron transport chain. The electron transport chain is a series of four enzyme complexes and two coenzymes:
- Complex I to Complex IV
- Coenzymes -ubiquinone and Cytochrome c
(c)
Interpretation:
The product formed from ADP in the electron transport chain should be determined.
Concept Introduction:
Aerobic respiration occurs in two steps;
- Glycolysis
- Citric acid cycle
In the presence of oxygen means aerobic respiration, this pyruvate enters in the Krebs cycle and extracts energy in the form of electrons transfer. Electrons are transferred from the pyruvate to the receptors like

Answer to Problem 56P
In the electron transport chain, ADP involves in the formation of ATP molecules in the mitochondria.
Explanation of Solution
Citric acid cycle is also known as tricarboxylic acid cycle or Krebs cycles. In this cycle all intermediates are carboxylate anions mainly which are formed from di or tricarboxylic acid during the reaction.
In this process, 2 H's are transferred to FAD and produces FADH2. This energy carrier remains attached to the enzyme and transfers the electrons to the electron transport chain. The electron transport chain is a series of four enzyme complexes and two coenzymes:
- Complex I to Complex IV
- Coenzymes -ubiquinone and Cytochrome c
(d)
Interpretation:
The product formed from O2in the electron transport chain should be determined.
Concept Introduction:
Aerobic respiration occurs in two steps;
- Glycolysis
- Citric acid cycle
In the presence of oxygen means aerobic respiration, this pyruvate enters in the Krebs cycle and extracts energy in the form of electrons transfer. Electrons are transferred from the pyruvate to the receptors like

Answer to Problem 56P
Electron transport chain process involves in the pumping of the protons from the mitochondrial matrix to the intermembrane space that reduces the oxygen to water molecule.
Explanation of Solution
Citric acid cycle is also known as tricarboxylic acid cycle or Krebs cycles. In this cycle all intermediates are carboxylate anions mainly which are formed from di or tricarboxylic acid during the reaction.
In this process, 2 H's are transferred to FAD and produces FADH2. This energy carrier remains attached to the enzyme and transfers the electrons to the electron transport chain. The electron transport chain is a series of four enzyme complexes and two coenzymes:
- Complex I to Complex IV
- Coenzymes -ubiquinone and Cytochrome c
Electron transport chain process involves in the pumping of the protons from the mitochondrial matrix to the intermembrane space that reduces the oxygen to water molecule.
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Chapter 23 Solutions
General, Organic, and Biological Chemistry - 4th edition
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