Marker Enzyme of Mitochondria are/is:
**Core Concept**
Mitochondria are often referred to as the "powerhouses" of eukaryotic cells, responsible for generating most of the cell's supply of adenosine triphosphate (ATP). The marker enzyme for mitochondria is an enzyme that is specifically localized within these organelles and can be used to identify and quantify their presence.
**Why the Correct Answer is Right**
The correct answer is **Cyclophorase**. Cyclophorase is an enzyme that is specifically localized within the inner mitochondrial membrane and is involved in the citric acid cycle (also known as the Krebs cycle or tricarboxylic acid cycle). This enzyme catalyzes the conversion of citrate to isocitrate and is a key component of the mitochondrial electron transport chain. The presence of cyclophorase is used as a marker to identify and quantify the presence of mitochondria in cells.
**Why Each Wrong Option is Incorrect**
**Option A:** (No option is provided, this needs to be fixed in the question)
**Option B:** This option is not correct as it does not accurately represent a marker enzyme for mitochondria.
**Option D:** This option is also incorrect as it does not accurately represent a marker enzyme for mitochondria.
**Clinical Pearl / High-Yield Fact**
It's worth noting that the marker enzyme for mitochondria is not the only enzyme that can be used to identify these organelles. Other enzymes such as cytochrome c oxidase and NADH dehydrogenase can also be used to identify mitochondria.
**Correct Answer: C. Cyclophorase**