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Standard XII
Biology
Question

Fructose is absorbed into the blood through mucosa cells of intestine by the process called as
  1. Active transport
  2. Facilitated transport
  3. Simple diffusion
  4. Co-transport mechanism

A
Active transport
B
Facilitated transport
C
Co-transport mechanism
D
Simple diffusion
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Solution
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Sucrose is digested by enzyme sucrase into glucose and fructose in the small intestine. Fructose diffuses through the mucosa cells of intestine by the process of facillated diffusion. It uses an integral membrane proteins known as hexose transporter GLUT - 2 to move polar or charged substances across the hydrophobic regions of the membrane.
So, the correct answer is option B.

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Fructose is absorbed into the blood through mucosa cells of intestine by the process called
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Q2

Small amounts of monosaccharides like glucose, amino acids and some of electrolytes like chloride ions are absorbed by (i). However, some of the substances like fructose and some amino acids are absorbed by the mechanism called (ii). Various nutrients like amino acids and electrolytes like Na+ are absorbed into the blood by (iii).

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Q3
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