An Element That is a Component of Hemoglobin, Myoglobin, and Cytochromes

Question

An element that is a component of hemoglobin, myoglobin, and cytochromes is
A) calcium.
B) magnesium.
C) iron.
D) zinc.
E) cobalt.

Accepted Answer

Iron is a component of hemoglobin, myoglobin, and cytochromes. Hemoglobin and myoglobin are proteins that transport and store oxygen in the blood and muscles, respectively. Cytochromes are proteins that play a role in cellular respiration and electron transport. Iron is an essential element for these proteins to function properly.