Advertisements
Advertisements
प्रश्न
What are porins? What role do they play in diffusion?
उत्तर
The porins are proteins that form huge pores in the outer membranes of the plastids, mitochondria and some bacteria allowing molecules up to the size of small proteins to pass through. Thus they play an important ‘ role in facilitated diffusion.
APPEARS IN
संबंधित प्रश्न
The main difference between active and passive transport across cell membrane is
Uniport, symport and antiport are the types of
Lipid soluble substances travel through the membrane by ______.
Smaller, lipid soluble molecules diffuse faster through cell membrane, but the movement of hydrophilic substances are facilitated by certain transporters which are chemically ______.
Identify the process occurring in I, II and III
How is the intracellular levels of ions maintained higher than extracellular levels in animal cells?
What are ‘aquaporins’? How does presence of aquaporins affect osmosis?
Differentiate between diffusion and translocation in plants.
How is facilitated diffusion different from diffusion?
Define Uniport, Symport and Antiport. Do they require energy?
Write a short note on facilitated diffusion.
