Question

Which of the following are correct about cellular respiration?
A. Cellular respiration is the breaking of C-C bonds of complex organic molecules by oxidation.
B. The entire cellular respiration takes place in Mitochondria.
C. Fermentation takes place under anaerobic condition in germinating seeds.
D. The fate of pyruvate formed during glycolysis depends on the type of organism also.
E. Water is formed during respiration as a result of O2 accepting electrons and getting reduced
Choose the correct answer from the options given below:

• A. A, C, D, E only
• B. A, B, E only
• C. A, B, C, E only
• D. B, C, D, E only

Answer 1

The Correct Option is A

To determine the correct statements about cellular respiration from the provided options, we need to evaluate each statement individually based on biological knowledge:

1. Statement A: "Cellular respiration is the breaking of C-C bonds of complex organic molecules by oxidation."
   This statement is correct. Cellular respiration involves the oxidation of organic molecules, resulting in the breaking of carbon-carbon (C-C) bonds to release energy stored in molecular structures.
2. Statement B: "The entire cellular respiration takes place in Mitochondria."
   This statement is incorrect. While the mitochondria is the site for crucial steps of cellular respiration like the Krebs cycle and the electron transport chain, glycolysis (the initial step of cellular respiration) occurs in the cytoplasm, not in the mitochondria.
3. Statement C: "Fermentation takes place under anaerobic condition in germinating seeds."
   This statement is correct. Fermentation is an anaerobic process that allows cells, including those in germinating seeds, to produce energy under oxygen-deficient conditions.
4. Statement D: "The fate of pyruvate formed during glycolysis depends on the type of organism also."
   This statement is correct. Different organisms process pyruvate through various pathways; for example, in anaerobic conditions, yeast converts pyruvate into ethanol and CO₂, while some bacteria may convert it into lactic acid.
5. Statement E: "Water is formed during respiration as a result of O₂ accepting electrons and getting reduced."
   This statement is correct. In the electron transport chain, oxygen acts as the final electron acceptor, combining with electrons and protons to form water.

The correct statements are A, C, D, and E. Therefore, the correct answer is:

A, C, D, E only