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 Metabolism

GOB Chemistry

21. The Generation of Biochemical Energy

Intro to Metabolism

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1:32 minutes

Problem 66b

Textbook Question

Identify each pathway as anabolic or catabolic
b. citric acid cycle

Verified step by step guidance

Understand the definitions of anabolic and catabolic pathways: Anabolic pathways involve the synthesis of complex molecules from simpler ones, requiring energy input. Catabolic pathways involve the breakdown of complex molecules into simpler ones, releasing energy.

Recall the purpose of the citric acid cycle (also known as the Krebs cycle or TCA cycle): It is a central metabolic pathway that breaks down acetyl-CoA into carbon dioxide while generating high-energy molecules like NADH and FADH2.

Analyze the process: The citric acid cycle involves the degradation of acetyl-CoA, which is a complex molecule, into simpler molecules (CO2) and the production of energy-rich compounds.

Determine the classification: Since the citric acid cycle is primarily involved in breaking down molecules and releasing energy, it is classified as a catabolic pathway.

Conclude that the citric acid cycle is a catabolic pathway based on its role in energy production and molecular breakdown.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Anabolic Pathways

Anabolic pathways are metabolic processes that build larger molecules from smaller ones, requiring energy input. These pathways are essential for growth, repair, and the synthesis of complex biomolecules like proteins, nucleic acids, and lipids. An example of an anabolic process is protein synthesis, where amino acids are linked together to form proteins.

Catabolic Pathways

Catabolic pathways are metabolic processes that break down larger molecules into smaller ones, releasing energy in the process. This energy is often captured in the form of ATP, which cells use for various functions. An example of a catabolic process is cellular respiration, where glucose is broken down to produce energy.

Citric Acid Cycle

The citric acid cycle, also known as the Krebs cycle, is a key metabolic pathway that plays a central role in cellular respiration. It is primarily catabolic, as it breaks down acetyl-CoA derived from carbohydrates, fats, and proteins into carbon dioxide and high-energy electron carriers. These carriers then enter the electron transport chain to produce ATP, highlighting the cycle's importance in energy production.

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