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

Introduction to Biosignaling

Biochemistry

12. Biosignaling

Introduction to Biosignaling

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Multiple Choice

Which hormone from the plot below shows the highest binding affinity for the receptor?

Hormone X.

Hormone Y.

Hormone Z.

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Verified step by step guidance

Understand that binding affinity refers to the strength of the interaction between a ligand (such as a hormone) and its receptor. A higher binding affinity means that a lower concentration of the ligand is needed to achieve a certain level of receptor activation.

Examine the plot, which shows the percentage of active receptors on the y-axis and the concentration of ligand on the x-axis. The x-axis is on a logarithmic scale, which is common for these types of plots.

Identify the curves for Hormone X, Hormone Y, and Hormone Z. Each curve represents the relationship between ligand concentration and receptor activation for one of the hormones.

Determine which hormone has the highest binding affinity by finding the curve that reaches a given percentage of active receptors (e.g., 50%) at the lowest ligand concentration. This is because a lower concentration needed for activation indicates a higher affinity.

Observe that Hormone X reaches a higher percentage of active receptors at a lower ligand concentration compared to Hormones Y and Z, indicating that Hormone X has the highest binding affinity for the receptor.