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

12. Biosignaling

Phosphoinositide GPCR Signaling

Biochemistry

12. Biosignaling

Phosphoinositide GPCR Signaling

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Multiple Choice

When epinephrine binds to a(n) ____________ receptor, _ is activated, causing an increase in the cellular concentration of ______________.

Beta ; G_αi ; Inositol triphosphate.

Alpha ; G_αq ; Inositol triphosphate.

Beta ; G_αi ; Diacylglycerol.

Alpha ; G_αs ; cAMP.

Beta ; G_αq ; Diacylglycerol & Inositol triphosphate.

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Verified step by step guidance

Identify the type of receptor that epinephrine binds to. Epinephrine can bind to different types of adrenergic receptors, such as alpha and beta receptors, which are part of the G protein-coupled receptor family.

Determine the specific G protein that is activated upon epinephrine binding. Different receptors activate different G proteins, such as Gαs, Gαi, or Gαq, each leading to distinct signaling pathways.

Understand the signaling pathway associated with the activated G protein. For example, Gαq activation typically leads to the activation of phospholipase C, which then catalyzes the formation of inositol triphosphate (IP3) and diacylglycerol (DAG).

Consider the cellular effects of the signaling molecules produced. IP3 increases intracellular calcium levels, while DAG activates protein kinase C, both contributing to various cellular responses.

Review the options provided and match the correct receptor type, G protein, and signaling molecules based on your understanding of the signaling pathways involved in epinephrine action.