<span>An enzyme is a biological term for a catalyst. Both speed up various reactions. All enzymes are catalysts, whereas not all catalysts are necessarily enzymes. Kinda like how all squares are quadrilaterals, whereas not all quadrilaterals are squares.</span>
Its d if not im so very sorry
I would assume B as your final
Answer
Answer:
The correct answer to the question is: b) Amphipathic molecules.
Explanation:
- The membrane structures are composed of molecules having both hydrophobic and hydrophilic regions. These are called Amphipathic molecules.
- The hydrophobic region is formed of water insoluble lipid (fatty acid) molecules which tend to avoid contact with water and so remain in the interior of the membrane.
- The hydrophilic region is formed by water soluble phosphate groups which forms hydrogen bonds with the water molecules and so remain on the surface of the membrane.
- Therefore, a membrane is formed from by a phospholipid bilayer, that is, two layers of phospholipid polymer where the lipid part is directed towards the centre away from water and the phosphate part towards the surface in association with water molecules.
- A single phopholipid moiety is composed of a glycerol molecule which forms two ester bonds with a phosphate group and a fatty acid molecule.
