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Which of the following is most appropriate for aerobic respiration?
(a) Glucose \overset{mitochondria}{\rightarrow} Pyruvate \overset{cytoplasm}{\rightarrow} CO_{2} + H_{2}O + Energy
(b) Glucose \overset{cytoplasm}{\rightarrow} Pyruvate \overset{mitochondria}{\rightarrow} CO_{2} + H_{2}O + Energy
(c) Glucose \overset{cytoplasm}{\rightarrow} Pyruvate + Energy \overset{mitochondria}{\rightarrow} CO_{2} + H_{2}O
(d) Glucose \overset{cytoplasm}{\rightarrow} Pyruvate + Energy  \overset{mitochondria}{\rightarrow} CO_{2} + H_{2}O + Energy

Answers (1)


Explanation: Aerobic respiration is a metabolic process that uses oxygen to generate energy in the mitochondria. It begins with glycolysis in the cytoplasm, where glucose is broken down into two molecules of pyruvate. These pyruvate molecules then enter the mitochondria and are oxidized during the citric acid cycle (Krebs cycle), producing carbon dioxide and high-energy electron carriers like NADH and FADH2. These carriers enter the electron transport chain in the inner mitochondrial membrane, where electrons are transferred through protein complexes, creating a proton gradient. Protons flow back into the mitochondrial matrix through ATP synthase, resulting in the production of ATP from ADP and inorganic phosphate. This process efficiently converts the energy stored in glucose into usable ATP for cellular functions. Hence, (b) is the correct option.

 

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