16 Questions
What is the main function of proteins in the cell membrane?
Maintain the cell's chemical climate and assist in molecule transfer
Which component forms a lipid bilayer in the cell membrane?
Phospholipids
What is the main role of cholesterol in animal cell membranes?
Provide structural support and regulate fluidity
Why are phospholipids considered amphipathic molecules?
They have both hydrophilic and hydrophobic parts
Which component helps to give membranes their flexibility?
Lipids
What makes the lipid bilayer semi-permeable?
Amphipathic nature of phospholipids
What is the function of glycoproteins in the cell membrane?
Assisting in cell recognition and acting as receptors and antigens
Which statement best describes the composition of the cell membrane?
Composed of two layers of phospholipids and embedded with proteins
What is the primary function of the cell membrane?
Regulating the entry and exit of substances into the cell
In what type of cells are glycoproteins found?
In both prokaryotic and eukaryotic cells
What role do receptor proteins play in cell function?
Facilitating communication with the external environment through signaling molecules
What is meant by the term 'semi-permeable' when describing the cell membrane?
It allows only selected substances to diffuse across the membrane
Which component of the plasma membrane is important for cell recognition and acts as receptors and antigens?
Glycoprotein
What is the main role of glycolipids in the plasma membrane?
Assisting in cell recognition and acting as receptors and antigens
What type of molecules make up the majority of the cell membrane's composition?
Carbohydrates bonded to lipids and proteins
What is a characteristic feature of phospholipids in a cell membrane?
They contain both hydrophilic heads and hydrophobic tails
Prepare for a quiz on the structure of the cell membrane. Study the composition of proteins and lipids, and their percentages in different locations and roles within the body. Videos can provide deeper understanding of the concepts.
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