Question

The enzymes needed for Krebs cycle are located in _________

• A. oxysomes of mitochondria
• B. matrix of mitochondria
• C. cytoplasm of cell
• D. outer membrane of mitochondria

Hint:

Krebs cycle occurs in the mitochondrial matrix, while ETC occurs on the inner membrane.

Answer 1

The Correct Option is B

Step 1: Understanding Krebs cycle.
The Krebs cycle, also known as the citric acid cycle, is a series of enzyme-mediated reactions involved in aerobic respiration.

Step 2: Location of Krebs cycle.
All enzymes required for the Krebs cycle are present in the mitochondrial matrix, except succinate dehydrogenase.

Step 3: Eliminating incorrect options.
Oxysomes are involved in ATP synthesis.
Cytoplasm is the site of glycolysis.
Outer mitochondrial membrane does not contain Krebs cycle enzymes.

Step 4: Conclusion.
Hence, Krebs cycle enzymes are located in the matrix of mitochondria.