Questions: is the iron-containing protein in red blood cells that carries oxygen.
Transcript text: is the iron-containing protein in red blood cells that carries oxygen.
Solution
The answer is the second one (Hemoglobin): the iron-containing protein in red blood cells that carries oxygen.
Explanation for each option:
Myoglobin: Incorrect. Myoglobin is an iron-containing protein found in muscle tissues, where it stores and releases oxygen, but it is not primarily responsible for carrying oxygen in the blood.
Hemoglobin: Correct. Hemoglobin is the iron-containing protein in red blood cells that binds to oxygen in the lungs and carries it to tissues throughout the body.
Cytochrome: Incorrect. Cytochromes are proteins involved in electron transport and energy production within cells, but they do not carry oxygen in the blood.
Ferritin: Incorrect. Ferritin is a protein that stores iron in the body, but it does not carry oxygen in the blood.
Summary:
The iron-containing protein in red blood cells that carries oxygen is Hemoglobin.