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

3. Amino Acids

Amino Acid Groups

Biochemistry

3. Amino Acids

Amino Acid Groups

Previous problemNext problem

Struggling with Biochemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which of the following statements about amino acid-based hormones is correct?

Most amino acid-based hormones are water soluble and cannot cross the plasma membrane.

All amino acid-based hormones are lipid soluble and can cross the plasma membrane.

Amino acid-based hormones are always derived from cholesterol.

Amino acid-based hormones bind to intracellular receptors.

Previous problemNext problem

Verified step by step guidance

Step 1: Understand the nature of amino acid-based hormones. Amino acid-based hormones are typically derived from amino acids and include peptides, proteins, and amines. They are generally water-soluble, meaning they dissolve in water and cannot easily pass through the lipid bilayer of the plasma membrane.

Step 2: Analyze the solubility and mechanism of action of amino acid-based hormones. Since they are water-soluble, they cannot cross the plasma membrane directly. Instead, they bind to receptors on the cell surface, triggering a signaling cascade inside the cell.

Step 3: Eliminate incorrect options. For example, the statement 'All amino acid-based hormones are lipid soluble and can cross the plasma membrane' is incorrect because most amino acid-based hormones are water-soluble. Similarly, 'Amino acid-based hormones are always derived from cholesterol' is incorrect because cholesterol is the precursor for steroid hormones, not amino acid-based hormones.

Step 4: Evaluate the statement 'Amino acid-based hormones bind to intracellular receptors.' This is incorrect because amino acid-based hormones typically bind to extracellular receptors on the plasma membrane due to their inability to cross the membrane.

Step 5: Confirm the correct statement. The correct answer is 'Most amino acid-based hormones are water soluble and cannot cross the plasma membrane,' as this aligns with the biochemical properties and mechanism of action of these hormones.