Multiple choice

The enzymes needed for TCA cycle in respiration are present in

  1. Endoplasmic reticulum

  2. Inner mitochondrial membrane

  3. Outer mitochondrial membrane

  4. Lysosomes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The enzymes for the TCA (Krebs) cycle are located in the mitochondrial MATRIX, not the inner membrane. The inner membrane contains the electron transport chain complexes. However, among the given options, the inner mitochondrial membrane is the closest and most relevant location for mitochondrial processes. The outer membrane, endoplasmic reticulum, and lysosomes have no role in the TCA cycle.

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