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Chapter 1: Problem 3

Each of the heme molecules in hemoglobin can bind ____molecule (s) of oxygen? a. one b. two c. three d. four e. five

Short Answer

Expert verified
a. one

Step by step solution

01

Understand the Question

The question asks how many molecules of oxygen can bind to each heme molecule in hemoglobin. Hemoglobin is a protein in red blood cells that carries oxygen.
02

Recall the Structure of Hemoglobin

Hemoglobin consists of four subunits, each containing one heme group. Each heme group has an iron atom that can bind to oxygen.
03

Determine the Oxygen Binding Capacity of Heme

Each heme molecule in hemoglobin binds exactly one molecule of oxygen.
04

Select the Correct Answer

Given the information, the correct answer is 'a. one.'

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

heme molecule
The heme molecule is a very important component of hemoglobin in our red blood cells. It is where oxygen binding occurs. Each heme molecule is made up of an iron atom at its center, which is essential for attaching to oxygen molecules. The iron atom in the heme molecule binds to one oxygen molecule at a time. This process allows hemoglobin to efficiently transport oxygen throughout the body. Without heme, hemoglobin can鈥檛 do its job.
oxygen binding capacity
The oxygen binding capacity of hemoglobin is critical for its function in the body. Hemoglobin is designed to hold and transport oxygen from our lungs to other parts of the body. Each hemoglobin molecule has four subunits, and each subunit contains one heme group. Each of these heme groups can bind to a single oxygen molecule. Therefore, one molecule of hemoglobin can carry up to four molecules of oxygen at a time. This ensures that enough oxygen is available to meet the body's needs.
hemoglobin structure
Hemoglobin has a complex structure that is essential for its function. It consists of four protein subunits: two alpha chains and two beta chains. Each subunit is connected to a heme group, which includes an iron atom. These four subunits allow hemoglobin to bind to four oxygen molecules at once, maximizing its efficiency. This structure helps hemoglobin pick up oxygen in the lungs and release it in tissues where it is needed. This design is key to maintaining adequate oxygen levels in the bloodstream.
protein in red blood cells
Hemoglobin is the crucial protein found in red blood cells. It is responsible for carrying oxygen from the lungs to the rest of the body and returning carbon dioxide back to the lungs for exhalation. Hemoglobin makes up about a third of the weight of a red blood cell. This protein is what gives red blood cells their color. Hemoglobin鈥檚 efficiency in oxygen transport is due to its ability to bind with oxygen in the lungs, and release it where it is most needed. This transport system is vital for life, as it keeps our organs and tissues functioning properly.

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