Rennin's primary function is to curdle milk in the stomach of infants.

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Prepare for the Leaving Certificate Digestion Test with engaging questions and explanations. Ready yourself with multiple choice quizzes, hints, and deep insights. Be exam-ready now!

Multiple Choice

Rennin's primary function is to curdle milk in the stomach of infants.

Explanation:
Rennin is a proteolytic enzyme in the infant stomach that acts on the milk protein casein to form a soft curd. This curdling slows the rate at which milk leaves the stomach and makes the proteins easier to digest, which is its defining role in infant digestion. It isn’t involved in activating pepsin, digesting fats, or absorbing minerals—those tasks are handled by other enzymes and processes. So the best description of its primary function is milk curdling.

Rennin is a proteolytic enzyme in the infant stomach that acts on the milk protein casein to form a soft curd. This curdling slows the rate at which milk leaves the stomach and makes the proteins easier to digest, which is its defining role in infant digestion. It isn’t involved in activating pepsin, digesting fats, or absorbing minerals—those tasks are handled by other enzymes and processes. So the best description of its primary function is milk curdling.

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