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

Lipids

Biochemistry

1. Introduction to Biochemistry

Lipids

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Multiple Choice

When energy-yielding nutrients are consumed in excess, which of the following are primarily stored in body fat?

Carbohydrates, proteins, and fats

Only fats

Only proteins

Only carbohydrates

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Verified step by step guidance

Understand the concept of energy storage in the body: The body stores excess energy from nutrients in the form of fat, regardless of whether the source is carbohydrates, proteins, or fats. This is because fat is a more efficient storage form of energy compared to glycogen or protein.

Review the metabolic pathways: Excess carbohydrates are converted into acetyl-CoA through glycolysis and then into fatty acids via lipogenesis. Proteins, when consumed in excess, are deaminated, and the remaining carbon skeletons can also be converted into acetyl-CoA and subsequently into fatty acids.

Recognize the role of fats: Dietary fats are directly stored as body fat after digestion and absorption, making them the most straightforward nutrient to store as fat.

Eliminate incorrect options: 'Only fats' is incorrect because carbohydrates and proteins can also be converted into fat. 'Only proteins' and 'Only carbohydrates' are incorrect for the same reason.

Conclude that the correct answer is 'Carbohydrates, proteins, and fats,' as all three macronutrients can contribute to body fat storage when consumed in excess.