Correct option is A
Explanation -
Option a - GLUT2
It facilitates the transport of glucose, galactose, and fructose from the basolateral membrane of intestinal epithelial cells into the bloodstream. It is present in basolateral membrane of enterocytes (intestinal cells). It transport through facilitated diffusion (passive).
Option b - GLUT3
GLUT 3 is high-affinity glucose transporter, mainly expressed in neurons. It is not present in intestinal epithelial cells. It plays crucial role in glucose uptake in cells with high glucose demand (e.g., brain).
It is not involved in monosaccharide export from intestinal cells.
Option c - GLUT4
GLUT 4 is insulin-regulated glucose transporter found in adipose tissue and muscle. It is not found in intestinal epithelial cells.
Option d - GLUT5
GLUT 5 is specialized for fructose transport. It is present in apical membrane of intestinal epithelial cells. It helps in fructose uptake into intestinal cells from the lumen. It is responsible for fructose entry, not exit.
So, the correct answer is option a - GLUT2
GLUT2 is the transporter responsible for exporting absorbed monosaccharides from intestinal epithelial cells into the bloodstream.
