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

1. Introduction to Biochemistry

Proteins

Biochemistry

1. Introduction to Biochemistry

Proteins

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Multiple Choice

Under normal conditions, protein provides no more than _____ of the body's energy needs.

60-70%

10-15%

40-50%

25-30%

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Verified step by step guidance

Understand the role of proteins in energy metabolism: Proteins are primarily used for growth, repair, and maintenance of body tissues. Under normal conditions, they are not the primary source of energy, as carbohydrates and fats are preferred.

Recall the percentage of energy contribution from proteins under normal conditions: Proteins typically provide a smaller proportion of the body's energy needs compared to carbohydrates and fats.

Eliminate incorrect options based on the typical energy contribution of proteins: High percentages like 60-70% and 40-50% are unrealistic under normal conditions, as proteins are not the primary energy source.

Focus on the correct range: Proteins generally contribute about 10-15% of the body's energy needs under normal conditions, which aligns with the correct answer.

Confirm the reasoning: The correct answer is based on the physiological preference for carbohydrates and fats as energy sources, with proteins serving as a secondary option under normal conditions.