All proteins present in the plasma membrane are of the transmembrane type, meaning they cross both sides of the lipid bilayer.

One of the structures found on the surface of the plasma membrane is glycolipids, an association between proteins and lipids.

One of the properties of the plasma membrane is selective permeability, which consists of controlling the entry and exit of certain substances from the cell.

The plasma membrane is formed by a double layer of phospholipids arranged in such a way that the hydrophilic portion faces the intracellular environment and the hydrophobic portion faces the extracellular environment.

Passive transport is a mechanism by which substances enter or exit cells and includes specific modes such as endocytosis, exocytosis, and the sodium-potassium pump.

One of the main structures of cells is the plasma membrane, responsible for delimiting the internal and external cellular environment. Regarding the structure and function of the plasma membrane, mark the correct alternative:

Biology

The correct alternative about the structure and function of the plasma membrane is that it has selective permeability, controlling the entry and exit of substances from the cell. The other alternatives present incorrect information, such as the orientation of phospholipids, the presence of glycolipids, the diversity of proteins, and the definition of passive transport. Selective permeability is essential for cellular homeostasis, allowing the entry of nutrients and the elimination of waste, while maintaining the stability of the internal environment.

Question about Cytology

Subject Biology

Biology

Source URCA

URCA

Topic Cytology

Cytology

Difficulty Medium

Medium

(URCA 2021) - Question Medium of Biology