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

Essential Amino Acids

Biochemistry

3. Amino Acids

Essential Amino Acids

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Multiple Choice

Which pair of statements best describes an essential amino acid?

It is only found in plant-based foods and is not present in animal proteins.

It cannot be synthesized by the human body and must be obtained from the diet.

It is used exclusively for energy production and not for protein synthesis.

It can be synthesized by the human body and is not required in the diet.

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Verified step by step guidance

Step 1: Begin by understanding the concept of essential amino acids. Essential amino acids are amino acids that cannot be synthesized by the human body and must be obtained through the diet.

Step 2: Evaluate the first statement: 'It is only found in plant-based foods and is not present in animal proteins.' This is incorrect because essential amino acids are found in both plant-based and animal-based foods.

Step 3: Evaluate the second statement: 'It cannot be synthesized by the human body and must be obtained from the diet.' This is correct and aligns with the definition of essential amino acids.

Step 4: Evaluate the third statement: 'It is used exclusively for energy production and not for protein synthesis.' This is incorrect because essential amino acids are primarily used for protein synthesis, although they can be used for energy production under certain conditions.

Step 5: Evaluate the fourth statement: 'It can be synthesized by the human body and is not required in the diet.' This is incorrect because this describes non-essential amino acids, not essential amino acids.