Question

in? The cell membrane. There are some particles outside the cell. A lipid soluble molecule is marked A. A water molecule is marked B. A molecule of glucose is marked C. A hydrogen ion is marked D. Which of these can RAPIDLY pass directly through the phospholipids of the plasma membrane, without the help of a transport protein? The cell membrane. There are some particles outside the cell. A lipid soluble molecule is marked A. A water molecule is marked B. A molecule of glucose is marked C. A hydrogen ion is marked D. A only B only C only D only B, C, and D

Answer 1

Answer:

The correct answer is - A only.

Explanation:

The phospholipid membrane that is hydrophobic layer which permits movement of the molecules with the help of various transport protein or carrier proteins only if they are large or hydrophilic in nature such as water,  however small molecules like hydrophobic molecules like lipids move through phospholipid by simple diffusion.

Rapid movement of the lipid is not need specific transport protein to cross phospholipid of the plasma membrane because of their hydrophobic nature.  It also allows rapid movement in transport of the CO2 and Oxygen.

Thus, the correct answer is - A only.