Which part of the small intestine is the main site of nutrient absorption?
A. Colon
B. Ileum
C. Duodenum
D. Jejunum
Answer: Option D
Solution (By JKSSB Mock Tests)
The jejunum, with its long villi and microvilli, is the primary site for absorption of digested nutrients. The ileum also absorbs vitamin B₁₂ and bile salts.
Explanation:
Chaperone proteins like BiP assist in proper protein folding in the rough ER. Misfolded proteins are degraded. Golgi modifies, lysosome digests.
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