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A cell membrane is said to be a bilayer. What forms the two layers?

A) Phospholipid molecules that self-arrange tail-to-tail

B) Proteins and carbohydrates with electrons

C) Aquaporins and proteins with opposite charges

D) Phospholipid molecules that self-arrange head-to-head

Respuesta :

Answer:

A

Explanation:

luisvaschetto

The cell membrane is a bilayer composed of phospholipid molecules that self-arrange tail-to-tail (Option A).

  • The main component of the lipid bilayer is phospholipids.

  • These phospholipids consist of polar phosphate heads and hydrophobic non-polar fatty acid tails.

  • In water, phospholipids arrange with their hydrophobic fatty acid tails facing each other in the interior of the lipid bilayer, whereas their hydrophilic phosphate heads face the outward aqueous side.

In conclusion, the cell membrane is a bilayer composed of phospholipid molecules that self-arrange tail-to-tail (Option A).

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