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

6. Enzymes and Enzyme Kinetics

Cofactor

Biochemistry

6. Enzymes and Enzyme Kinetics

Cofactor

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Multiple Choice

Which of the following can serve as cofactors in enzymatic reactions?

Mg^{2+} ions

Glucose

ATP synthase

DNA

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Verified step by step guidance

Understand the concept of cofactors: Cofactors are non-protein chemical compounds or metallic ions that are required for an enzyme's activity as a catalyst. They can be either organic molecules (coenzymes) or inorganic ions (metal ions).

Analyze each option: Determine whether each given option can act as a cofactor in enzymatic reactions. For example, Mg^{2+} ions are known to stabilize negative charges on substrates or enzymes, making them a common cofactor in reactions involving ATP.

Evaluate glucose: Glucose is a substrate in metabolic reactions, not a cofactor. Substrates are molecules upon which enzymes act, whereas cofactors assist enzymes in catalysis.

Assess ATP synthase: ATP synthase is an enzyme, not a cofactor. It catalyzes the synthesis of ATP from ADP and inorganic phosphate, but it itself is not a cofactor.

Consider DNA: DNA is a macromolecule that stores genetic information and does not function as a cofactor in enzymatic reactions. It is not involved in assisting enzyme catalysis.