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

Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism

Pyruvate Oxidation

Biochemistry

Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism

Pyruvate Oxidation

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Multiple Choice

After glycolysis, which metabolic process occurs to convert pyruvate into acetyl-CoA before entering the citric acid cycle?

Fermentation

Gluconeogenesis

Beta-oxidation

Pyruvate oxidation

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Verified step by step guidance

Understand that glycolysis is the metabolic pathway that breaks down glucose into two molecules of pyruvate, generating ATP and NADH in the process.

Recognize that pyruvate oxidation is the next step in cellular respiration, which occurs in the mitochondria. This process converts pyruvate into acetyl-CoA, a key molecule for the citric acid cycle.

Learn that pyruvate oxidation involves the enzyme complex pyruvate dehydrogenase, which catalyzes the reaction. During this process, pyruvate is decarboxylated (loses a carbon as CO₂).

Understand that the remaining two-carbon molecule is oxidized, and the electrons are transferred to NAD⁺, forming NADH. This step is crucial for energy production in later stages of cellular respiration.

Finally, recognize that the two-carbon molecule is attached to coenzyme A, forming acetyl-CoA, which is then ready to enter the citric acid cycle for further energy extraction.