Correct option is D
Correct Answer: (d) Both a and c
Explanation:
→ Pepsin is the main proteolytic enzyme secreted in the acidic environment of the stomach.
→ Trypsin, although primarily pancreatic, also contributes to protein digestion once chyme enters the intestine.
→ Together they play the dominant roles in fish protein digestion.
Information Booster:
→ Stomach-bearing fishes rely heavily on protein digestion due to carnivorous diets.
→ Enzyme activity varies with temperature, diet type, and species.
→ Amylase is more prominent in herbivorous/omnivorous fishes.
Additional Information (Other Options):
(a) Trypsin alone is not predominant.
(b) Amylase is minimal in stomach.
(c) Pepsin alone is important but not the only major enzyme.