Which enzyme breaks down protein in the stomach?

Q: Which enzyme breaks down protein in the stomach?


  • Pepsin is an enzyme which breaks down protein in the stomach.
  • It is produced and secreted by the chief cells in the stomach lining as an inactive form called pepsinogen.
  • Pepsinogen is activated by the low PH of about 1.5-2.0, to its active form,
  • Pepsin primarily acts on proteins and peptides which are rich in amino acids For example, phenylalanine and tyrosine.
Enzyme Pepsin
Location Stomach
Function Breaks down proteins into smaller peptide fragments
Optimal pH Around pH 1.5-2.0 (acidic environment of the stomach)
Optimal Temperature Around 37°C (body temperature)
Products Smaller peptide fragments
Significance Essential for protein digestion in the stomach
Associated Organs Stomach
Other Actions Activates other pepsinogen molecules and contributes to the autocatalytic process
Deficiency Pepsin deficiency is rare, but it can lead to impaired protein digestion and malabsorption

Important Questions about Enzymes

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  4. Which enzyme digests protein?
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  6. Which enzyme is not present in succus entericus?
  7. Which enzyme breaks down protein in the stomach?
  8. Which enzyme converts fibrinogen to fibrin?
  9. Which enzyme converts glucose into alcohol?
  10. Which enzyme digests fat?
  11. Which enzyme digests milk protein?
  12. Which enzyme is used in PCR?
  13. Which enzyme unzips the DNA double helix?
  14. Which liver enzyme increases with alcohol?
  15. Which enzyme cuts DNA?
  16. Which enzyme catalyzes the first step of glycolysis?
  17. Which enzyme binds DNA fragments together?
  18. Which enzyme transcribes DNA into RNA?
  19. which enzyme adds new nucleotides?
  20. Which enzyme digests cellulose?
  21. Which enzyme separates the two strands of DNA?
  22. Which enzyme converts carbohydrates into glucose?
  23. Which enzyme removes RNA primer?
  24. Which enzymes help in digestion?
  25. Which enzyme works best in acidic conditions?
  26. Which enzyme synthesizes tRNA?
  27. Which enzyme secreted by pancreas?
  28. Which enzyme converts maltose into glucose?
  29. Which vitamins work as coenzyme?