Question

All of the following contribute to the structure of the plasma membrane except what?

O secretory vesicles
O phospholipids
O cholesterol molecules
O proteins

Answer 1

Phospholipids, cholesterol molecules, and proteins contribute to the structure of the plasma membrane, while secretory vesicles do not.

Step-by-step explanation:

All of the components mentioned in the question contribute to the structure of the plasma membrane. Phospholipids form the main structural component, creating a bilayer that acts as a barrier. Cholesterol molecules are embedded within the phospholipid bilayer, providing stability and flexibility. Proteins are also an essential part of the plasma membrane, serving various functions such as transport, cell signaling, and cell recognition. However, secretory vesicles do not contribute to the structure of the plasma membrane as they are involved in the transport of molecules within the cell and towards the cell membrane.

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