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

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Multiple Choice

Which statement is true regarding the recommended dietary intake of protein for healthy adults?

Protein requirements are the same for all individuals, regardless of age or activity level.

Most adults require at least 3 grams of protein per kilogram of body weight per day.

The recommended dietary allowance (RDA) for protein is approximately 0.8 grams per kilogram of body weight per day.

Dietary protein is not necessary if sufficient carbohydrates are consumed.

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Verified step by step guidance

Step 1: Understand the concept of Recommended Dietary Allowance (RDA). The RDA is the average daily intake level sufficient to meet the nutrient requirements of nearly all (97–98%) healthy individuals in a specific life stage and gender group. For protein, this value is based on maintaining nitrogen balance in the body.

Step 2: Recall the specific RDA for protein in healthy adults. The RDA for protein is approximately 0.8 grams of protein per kilogram of body weight per day. This value is based on the needs of a sedentary adult and may vary with age, activity level, or health conditions.

Step 3: Evaluate the first statement: 'Protein requirements are the same for all individuals, regardless of age or activity level.' This is incorrect because protein requirements can vary based on factors such as age, physical activity, and physiological conditions (e.g., pregnancy or illness).

Step 4: Evaluate the second statement: 'Most adults require at least 3 grams of protein per kilogram of body weight per day.' This is incorrect because 3 grams per kilogram is significantly higher than the RDA and is not necessary for most healthy adults.

Step 5: Evaluate the fourth statement: 'Dietary protein is not necessary if sufficient carbohydrates are consumed.' This is incorrect because proteins provide essential amino acids that the body cannot synthesize, and they play critical roles in various physiological processes. Carbohydrates cannot replace the need for dietary protein.