Question:

Select the correct statement from the following regarding cell membrane

Updated On: Jul 28, 2022
  • $Na^+$ and $K^+$ ions move across cell membrane by passive transport
  • Proteins make up 60 to $70\%$ of the cell membrane
  • Lipids are arranged in a bilayer with polar heads towards the inner part
  • Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
Hide Solution
collegedunia
Verified By Collegedunia

The Correct Option is D

Solution and Explanation

According to the fluid mosaic model of cell membrane structure proposed by Singer and Nicolson (1972) plasma membrane contains about 50-60% proteins and 50^0% lipids. Lipids form a bilayer with hydrophilic heads pointing outwards. Cell membrane allows transport of some molecules by passive transport e.g., water, neutral solutes while some are transported actively e.g., Na+/K+ pump.
Was this answer helpful?
0
0

Concepts Used:

Eurkaryotic Cells - Golgi Apparatus

The Golgi apparatus is also known as the Golgi complex or the Golgi body. The term is derived from Camillo Golgi, the scientist who discovered the organelle. It can be found in all eukaryotic cells, including plants and animals. They are membrane-bound organelles found in the cell's cytoplasm

Formation of acrosome: The acrosome is a component of the tip of animal sperms that aids in the digestion of the egg or ovum covering sheath during fertilisation. The Golgi complex produces it with the help of its vesicles.