Question

Which element is present in cytochrome?

• A. Magnesium
• B. Iron
• C. Calcium
• D. Potassium

Hint:

Iron in the heme group of cytochromes enables their role in cellular respiration and energy production by facilitating electron transport in the mitochondria.

Answer 1

The Correct Option is B

Cytochromes are a group of heme proteins critical for electron transport in mitochondria. The heme group in cytochromes contains an iron ion (Fe) at its core. This iron atom plays an essential role in facilitating electron transfer as it can alternate between the ferrous (Fe²⁺) and ferric (Fe³⁺) states.

Given this characteristic, the element present in cytochromes is:

• Iron