Question

What do we call a process by which fructose is absorbed into the blood through the mucosa cells of the intestine?

• A. Co-transport mechanism
• B. Facilitated transport
• C. Active transport
• D. Simple diffusion

Answer 1

The correct option is B

Facilitated transport

The correct option is B

Explanation for correct option:

1. In the intestinal tract, fructose is absorbed via glucose transporters (GLUT) mostly GLUT-2 and GLUT-5.
2. Fructose enters the body via GLUT5 assisted diffusion and is then delivered into the bloodstream via GLU2 receptors.
3. As it does not require energy for transport so a kind of passive transport.
4. This process is called facilitated transport.

Explanation for incorrect option:

Option A:

1. A co-transporter is a carrier protein that facilitates the simultaneous transport of two distinct species such as an ion and a solute across the membrane.
2. Co-transport refers to the movement of two different molecules simultaneously.

Option C:

1. The intake of glucose in the intestines of humans and the intake of mineral ions into root hair cells of plants are examples of active transport.

Option D:

1. Water, oxygen, carbon dioxide, ethanol, and urea are examples of molecules that can flow in and out of the cell membrane via simple diffusion.
2. They pass through the cell membrane without using any energy.

Final Answer: A process by which fructose is absorbed into the blood through the mucosa cells of the intestine is called as facilitated transport.