Question

Which of the following features of phospholipids allows for the phospholipid to interact with the aqueous environment in the extracellular media and the intracellular cytosolic environment?

1. The three-carbon glycenal backbone
2. Fatty acids, attached to the three-carbon glycerol backbone of the phospholipid through ester linkages
3. Phospholipids do not interact with aqueous environments, such as the extracellular between the cell and the aqueous extracellular and intracellular environments O medium or the cytosolic medium. Phospholipids provide a purely hydrophobic barrier
4. The presence of a polar or charged head group attached to the phosphate

Answer 1

The presence of a polar or charged head group attached to the phosphate allows phospholipids to interact with the aqueous environment in both extracellular and intracellular cytosolic environments.

Step-by-step explanation:

The feature of phospholipids that allows them to interact with the aqueous environment in both the extracellular and intracellular cytosolic environments is the presence of a polar or charged head group attached to the phosphate. Phospholipids have a hydrophobic tail region and a hydrophilic head region. The polar head group interacts with the surrounding water molecules, while the hydrophobic tails cluster together, forming a barrier against the water.

Answer 2

The correct answer is 4. The presence of a polar or charged head group attached to the phosphate.

Step-by-step explanation:

Lipids have a hydrophilic head and a hydrophobic tail. This allows them to form structures where the tails are hidden on the inside, and the heads interact with the water molecules. This conformation is the best energetically and allows the lipids to interact with aqueous environments.