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

25. Protein and Amino Acid Metabolism

The Urea Cycle

GOB Chemistry

25. Protein and Amino Acid Metabolism

The Urea Cycle

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Multiple Choice

What is the function of aspartate in the urea cycle?

Produces CO₂ for carbamoyl phosphate synthesis.

Provides –NH₂ group as ammonium ion.

Produces succinate for citrulline formation.

Provides the second nitrogen atom for urea.

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Verified step by step guidance

Understand the urea cycle: The urea cycle is a series of biochemical reactions that produce urea from ammonia. It is a crucial process for removing excess nitrogen from the body.

Identify the role of aspartate: In the urea cycle, aspartate provides the second nitrogen atom needed for the synthesis of urea.

Examine the reaction involving aspartate: Aspartate combines with citrulline to form argininosuccinate, which is then converted to arginine, releasing fumarate.

Recognize the importance of nitrogen atoms: Urea contains two nitrogen atoms, one from ammonia and the other from aspartate, highlighting the importance of aspartate in the cycle.

Connect the function of aspartate to the overall cycle: By providing the second nitrogen atom, aspartate plays a critical role in the conversion of toxic ammonia into urea, which can be safely excreted from the body.