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Digestion and Absorption — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYDigestion and Absorption3 Marks
Question
Bile juice contains no digestive enzymes, yet it is important for digestion. Why?
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Answer

Bile has no enzymes but contains bile salts, namely, sodium bicarbonate, sodium glycocholate and sodium taurocholate that reduce the surface tension of large fat drop¬lets and break them into many small droplets by a process known as emulsification. These small fat droplets present large surface area for lipase (fat digesting enzyme) to act upon them. Moreover, bile also activates lipases.$\text{Fat(triglyceride)}\xrightarrow[]{\text{Bile}}\text{Emulsified fat}$

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