Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

8. Protein Function

Hemoglobin Cooperativity

Biochemistry

8. Protein Function

Hemoglobin Cooperativity

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Multiple Choice

Each heme ring in hemoglobin encloses an atom of:

Calcium (Ca)

Magnesium (Mg)

Iron (Fe)

Copper (Cu)

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Verified step by step guidance

Understand the structure of hemoglobin: Hemoglobin is a protein found in red blood cells responsible for oxygen transport. It contains four heme groups, each of which binds oxygen molecules.

Learn about the heme group: The heme group is a complex structure consisting of a porphyrin ring that encloses a central metal ion. This metal ion is crucial for the function of hemoglobin.

Identify the metal ion in the heme group: The central metal ion in the heme group is iron (Fe). Iron is essential for binding oxygen molecules and facilitating their transport throughout the body.

Compare the options provided: Calcium (Ca), Magnesium (Mg), and Copper (Cu) are not involved in the heme group of hemoglobin. Iron (Fe) is the correct answer because it is the metal ion enclosed by the porphyrin ring in the heme group.

Conclude the explanation: The heme group in hemoglobin specifically encloses an atom of iron (Fe), which plays a critical role in oxygen binding and transport.