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

2. Water

Acids and Bases

Biochemistry

2. Water

Acids and Bases

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Multiple Choice

The digestion of which food group may be affected by an inadequate amount of stomach acid?

Nucleic acids

Proteins

Lipids

Carbohydrates

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Verified step by step guidance

Understand the role of stomach acid (hydrochloric acid, HCl) in digestion: Stomach acid creates an acidic environment (pH ~1.5-3.5) that is essential for activating pepsinogen into pepsin, an enzyme responsible for protein digestion.

Review the digestion process for each food group: Proteins require pepsin for initial breakdown in the stomach, while carbohydrates, lipids, and nucleic acids are primarily digested in the small intestine with the help of enzymes like amylase, lipase, and nucleases.

Analyze the impact of inadequate stomach acid: Without sufficient stomach acid, pepsinogen cannot be converted into pepsin, impairing the digestion of proteins. Other food groups (carbohydrates, lipids, nucleic acids) are less affected because their digestion relies on enzymes secreted by the pancreas and small intestine.

Correlate the physiological mechanism with the correct answer: Proteins are the food group most affected by low stomach acid due to their reliance on pepsin for initial digestion.

Conclude that the correct answer is 'Proteins' based on the dependency of protein digestion on stomach acid and pepsin activation.