Question:
Consider the following statements:
Statement I: Both anal sphincters are formed by smooth muscles in man.
Statement II: Renin converts the milk into curd.
Consider the following statements:
Statement I: Both anal sphincters are formed by smooth muscles in man.
Statement II: Renin converts the milk into curd.
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Internal anal sphincter = Smooth muscle (involuntary)
External anal sphincter = Skeletal muscle (voluntary)
Renin (Chymosin) helps coagulation of milk in infants.
Updated On: Jun 17, 2026
- Both statement I and statement II are true
- Both statement I and statement II are false
- Statement I is true, but statement II is false
- Statement I is false, but statement II is true
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The Correct Option is D
Solution and Explanation
Concept:
The human digestive system contains two anal sphincters:
• Internal anal sphincter $\rightarrow$ Smooth muscle (involuntary).
• External anal sphincter $\rightarrow$ Skeletal muscle (voluntary). Renin (Rennin/Chymosin) is an enzyme found in infants that converts milk protein casein into paracasein and helps curd formation.
Step 1: Examine Statement I. Internal anal sphincter is made of smooth muscle. External anal sphincter is made of skeletal muscle. Therefore both sphincters are not smooth muscles. Hence Statement I is false.
Step 2: Examine Statement II. Renin acts on milk protein casein. \[ \text{Casein} \xrightarrow{\text{Renin}} \text{Paracasein} \] This causes coagulation of milk and formation of curd. Hence Statement II is true.
Step 3: Choose the correct option. Statement I $\rightarrow$ False Statement II $\rightarrow$ True \[ \boxed{\text{Option (D)}} \]
• Internal anal sphincter $\rightarrow$ Smooth muscle (involuntary).
• External anal sphincter $\rightarrow$ Skeletal muscle (voluntary). Renin (Rennin/Chymosin) is an enzyme found in infants that converts milk protein casein into paracasein and helps curd formation.
Step 1: Examine Statement I. Internal anal sphincter is made of smooth muscle. External anal sphincter is made of skeletal muscle. Therefore both sphincters are not smooth muscles. Hence Statement I is false.
Step 2: Examine Statement II. Renin acts on milk protein casein. \[ \text{Casein} \xrightarrow{\text{Renin}} \text{Paracasein} \] This causes coagulation of milk and formation of curd. Hence Statement II is true.
Step 3: Choose the correct option. Statement I $\rightarrow$ False Statement II $\rightarrow$ True \[ \boxed{\text{Option (D)}} \]
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