The cell membrane is best described as:
Fully permeable
Impermeable
Selectively permeable
Rigid and unchanging
Related Questions
Most common type of lipids found in plasma membrane is A and they show B__ movement with in the plasma membrane. Choose the most appropriate option to fill A and B.
phospholipids; lateral
glycolipids; transverse
cholesterol; rotational
proteins; flip-flop
Solenoid is a structure of
Nucleosomal organisation with 10nm thickness
Condensed chromatin fibre with 30nm diameter
Highly condensed form of chromatid with 300 nm thickness
Well organised chromatid with 700 nm thickness
The thickness of unit membrane is
The thickness of unit membrane is
The fluidity of the cell membrane is influenced by several factors. Which of the following would DECREASE membrane fluidity?
Increased proportion of unsaturated fatty acids
Shorter fatty acid chain length
Increased cholesterol content at high temperatures
Decreased cholesterol content at low temperatures
Lipid rafts are specialized microdomains within the cell membrane. Which of the following statements about their composition and function is INCORRECT?
They are enriched in cholesterol and sphingolipids.
They are involved in signal transduction and membrane trafficking.
They exhibit reduced fluidity compared to the surrounding membrane.
They are primarily composed of unsaturated phospholipids and peripheral membrane proteins.
What is the function of cholesterol in the cell membrane?
Provide structural support
Transport molecules
Maintain fluidity
Act as receptors
The fluid mosaic model describes the cell membrane as:
A rigid, static layer
A solid barrier
A dynamic structure with embedded proteins
A single layer of phospholipids
Cell membrane in animals is composed mainly of the molecules of?
Lipids
Proteins
1 and 2
Carbohydrates
Select the incorrect statement about plasma membrane
It is selectively permeable.
It is composed of a phospholipid bilayer.
It contains proteins.
It is primarily composed of carbohydrates.
