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

Carbohydrates

Biochemistry

1. Introduction to Biochemistry

Carbohydrates

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Multiple Choice

Which of the following is a ketone body?

Glucose

Fructose

Lactate

Acetoacetate

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Verified step by step guidance

Step 1: Begin by understanding the concept of ketone bodies. Ketone bodies are water-soluble molecules produced in the liver during fatty acid metabolism, particularly during fasting, prolonged exercise, or low carbohydrate intake. The three primary ketone bodies are acetoacetate, β-hydroxybutyrate, and acetone.

Step 2: Review the chemical structures of the given options. Glucose and fructose are carbohydrates (monosaccharides), and lactate is a byproduct of anaerobic glycolysis. None of these are classified as ketone bodies.

Step 3: Focus on acetoacetate. Acetoacetate is one of the three ketone bodies and is formed during the breakdown of fatty acids and ketogenic amino acids. It serves as an energy source for tissues like the brain and muscles during periods of low glucose availability.

Step 4: Compare acetoacetate to the other options. Glucose and fructose are sugars, and lactate is an organic acid. Acetoacetate, on the other hand, is a ketone body, making it the correct answer.

Step 5: Conclude that acetoacetate is the correct answer based on its classification as a ketone body, while the other options do not fit this category.