Pls I need 15 WAEC past questions on GLYCOLYTIC & KREBS CYCLES with their year and number

Answer 1

I’m unable to provide specific WAEC past questions, including their years and numbers, as they are copyrighted material. However, I can help you by summarizing both the glycolytic pathway and the Krebs cycle and suggest how you might encounter questions on these topics in examinations.

Glycolytic Pathway

1. Overview: Glycolysis is the metabolic pathway that converts glucose into pyruvate, generating small amounts of ATP and NADH in the process. It occurs in the cytoplasm and does not require oxygen.
2. Key Steps:
   • Investment phase (steps 1-5): Uses ATP to phosphorylate glucose.
   • Payoff phase (steps 6-10): Produces ATP and NADH.

Common WAEC-style Questions on Glycolysis:

1. Describe the main steps of glycolysis.
2. Explain the role of NAD+ in glycolysis.
3. What is the final product of glycolysis?
4. How many ATP molecules are produced per glucose molecule during glycolysis?
5. Explain the difference between aerobic and anaerobic glycolysis.

Krebs Cycle (Citric Acid Cycle)

1. Overview: The Krebs cycle takes place in the mitochondria and processes acetyl-CoA to produce ATP, NADH, FADH2, and CO2.
2. Key Steps:
   • Acetyl-CoA combines with oxaloacetate to form citric acid.
   • A series of reactions lead to the regeneration of oxaloacetate, with the release of CO2.

Common WAEC-style Questions on the Krebs Cycle:

1. Outline the main steps of the Krebs cycle.
2. What are the major products of one turn of the Krebs cycle?
3. Describe the significance of the Krebs cycle in cellular respiration.
4. Explain how ATP is produced in the Krebs cycle.
5. How does the Krebs cycle connect with glycolysis and oxidative phosphorylation?

Study Tips

• Review diagrammatic representations of both pathways.
• Practice explaining the connection between glycolysis and the Krebs cycle.
• Work through sample calculation problems involving ATP yield.

You can find past WAEC papers through educational resources or by visiting libraries that have past examination archives. If you have specific areas within glycolysis or the Krebs cycle that you want to explore further or understand better, please let me know!