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 organic compound do brain cells primarily rely on for fuel?

Glucose

Lactate

Amino acids

Fatty acids

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Verified step by step guidance

Understand the context: Brain cells primarily rely on a specific organic compound for energy. This is because the brain has unique metabolic requirements compared to other tissues in the body.

Recall the primary energy source for the brain: Glucose is the main fuel for brain cells under normal physiological conditions. It is transported across the blood-brain barrier and metabolized to produce ATP, the energy currency of the cell.

Consider alternative energy sources: While glucose is the primary fuel, lactate can also be used by brain cells under certain conditions, such as during intense exercise or hypoglycemia. Fatty acids and amino acids are generally not significant energy sources for the brain due to the blood-brain barrier and metabolic constraints.

Eliminate incorrect options: Fatty acids are not used directly by brain cells because they cannot cross the blood-brain barrier efficiently. Amino acids are primarily used for protein synthesis rather than energy production in the brain.

Conclude with the correct answer: Based on the brain's reliance on glucose for energy under normal conditions, glucose is the primary organic compound brain cells rely on for fuel.