Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

21. The Generation of Biochemical Energy

Intro to Citric Acid Cycle

GOB Chemistry

21. The Generation of Biochemical Energy

Intro to Citric Acid Cycle

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Multiple Choice

Which one of the following substances is a part of both phases A and C of the citric acid cycle?

Succinyl CoA

Oxaloacetate

Acetyl CoA

Citrate

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Verified step by step guidance

Understand the citric acid cycle: The citric acid cycle, also known as the Krebs cycle, is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidation of acetate derived from carbohydrates, fats, and proteins into carbon dioxide.

Identify the phases of the citric acid cycle: Phase A typically involves the entry of Acetyl CoA into the cycle, while Phase C involves the regeneration of Oxaloacetate.

Examine the role of each substance: Acetyl CoA enters the cycle by combining with Oxaloacetate to form Citrate. Succinyl CoA is involved later in the cycle, but not in the initial or final phases.

Determine the substance present in both phases A and C: Oxaloacetate is regenerated at the end of the cycle and is also the molecule that combines with Acetyl CoA at the beginning of the cycle.

Conclude which substance is part of both phases: Based on the cycle's structure, Oxaloacetate is the substance that appears in both Phase A (as it combines with Acetyl CoA) and Phase C (as it is regenerated).