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

Enzymes

Biochemistry

6. Enzymes and Enzyme Kinetics

Enzymes

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Multiple Choice

Which of the following enzymes converts ATP to cAMP?

Phosphodiesterase

Hexokinase

Protein kinase A

Adenylate cyclase

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Verified step by step guidance

Understand the role of ATP and cAMP in cellular signaling. ATP (adenosine triphosphate) is a molecule used for energy transfer, while cAMP (cyclic adenosine monophosphate) acts as a secondary messenger in signal transduction pathways.

Identify the enzyme responsible for converting ATP to cAMP. This process involves the removal of two phosphate groups from ATP and the formation of a cyclic structure in the remaining molecule.

Recall that adenylate cyclase is the enzyme that catalyzes this reaction. It is typically activated by G-protein-coupled receptors in response to extracellular signals.

Differentiate adenylate cyclase from other enzymes listed in the options. For example, phosphodiesterase breaks down cAMP into AMP, hexokinase phosphorylates glucose, and protein kinase A is activated by cAMP but does not produce it.

Conclude that adenylate cyclase is the correct enzyme responsible for converting ATP to cAMP, as it directly catalyzes this specific reaction in the signaling pathway.