Join thousands of students who trust us to help them ace their exams!Watch the first video
Multiple Choice
Which of the following is not part of the plasma membrane?
A
Phospholipids
B
Ribosomes
C
Proteins
D
Cholesterol
Verified step by step guidance
1
Understand the structure of the plasma membrane: The plasma membrane is primarily composed of a phospholipid bilayer, which provides a flexible matrix and creates a barrier to permeability.
Identify the components of the plasma membrane: The main components include phospholipids, proteins, and cholesterol. Phospholipids form the basic structure, proteins are embedded within or attached to the bilayer, and cholesterol helps to stabilize the membrane's fluidity.
Recognize the role of phospholipids: Phospholipids are crucial for forming the bilayer structure of the membrane, with hydrophilic heads facing outward and hydrophobic tails facing inward.
Understand the function of proteins in the membrane: Proteins serve various functions such as transport, acting as receptors, and providing structural support.
Identify what is not part of the plasma membrane: Ribosomes are not part of the plasma membrane. They are cellular structures responsible for protein synthesis and are found in the cytoplasm or attached to the endoplasmic reticulum.