In the sequential reactions of acetyl CoA formation and the citric acid cycle, pyruvate (the output from glycolysis) is completely oxidized, and the electrons produced from this oxidation are passed on to two types of electron acceptors.
Place the labels on the left to show the net redox reaction in acetyl CoA formation and the citric acid cycle. Note that two types of electron carriers are involved.
Answer (2)
The net redox reaction in acetyl CoA formation and the citric acid cycle involves the oxidation of pyruvate into acetyl CoA and further processing in the cycle. The overall reaction involves inputs such as O2, ADP, and electrons captured by NADH and FADH2, resulting in outputs like CO2, ATP, and water. This process is critical for extracting energy from carbohydrates in cellular respiration.
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The problem involves identifying the net redox reaction in acetyl CoA formation and the citric acid cycle.
Key inputs and outputs are identified, including pyruvate, O 2 , A D P + P i , F A D , C O 2 , A TP , H 2 O , N A DH , and F A D H 2 .
The net reaction is represented using the provided labels.
The final net redox reaction is: O 2 + A D P + P i + F A D → C O 2 + A TP + H 2 O + N A DH + F A D H 2 .
Explanation
Understanding the Problem We are asked to identify the net redox reaction in acetyl CoA formation and the citric acid cycle. This involves understanding the inputs and outputs of these processes, particularly focusing on the electron carriers.
Identifying Inputs and Outputs The net reaction combines acetyl CoA formation and the citric acid cycle. Key inputs include pyruvate, O 2 , A D P + P i , F A D , and N A D + . Key outputs include C O 2 , A TP , H 2 O , N A DH , and F A D H 2 .
Formulating the Reaction Based on the provided labels, we need to arrange them to represent the overall redox reaction. The general form is: Reactants → Products. In this case, the simplified reaction can be represented as: Pyruvate + O 2 + A D P + P i + F A D → C O 2 + A TP + H 2 O + N A DH + F A D H 2 .
The Net Redox Reaction Therefore, the net redox reaction, using the provided labels, can be represented as follows:
O 2 + A D P + P i + F A D → C O 2 + A TP + H 2 O + N A DH + F A D H 2
Final Answer The final answer is the arrangement of the provided labels to represent the net redox reaction in acetyl CoA formation and the citric acid cycle.
Examples
Understanding redox reactions is crucial in various biological processes. For example, in cellular respiration, glucose is oxidized to produce energy in the form of ATP. The electrons released during this oxidation are transferred to electron carriers like NADH and FADH2, which then donate them to the electron transport chain to generate more ATP. This process is essential for life as it provides the energy needed for cells to function.
