What is the function of cholesterol in the cell membrane?
Provide structural support
Transport molecules
Maintain fluidity
Act as receptors
Related Questions
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
Plasma membrane helps in
Transportation of only water in and out of cell
Protein synthesis
Osmoregulation
Nucleic acid synthesis
Which component of the cell membrane is primarily responsible for its selective permeability?
Glycoproteins
Peripheral proteins
Phospholipid bilayer
Cholesterol
Keeping in view the ‘fluid mosaic model’ for the structure of cell membrane, which one of the following statement is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?
Both lipids and proteins can flip-flop
While lipids can rarely flip-flop, proteins cannot
While proteins can flip-flop, lipids cannot
Neither lipids nor proteins can flip-flop
Certain integral membrane proteins facilitate the passage of water across the cell membrane. These proteins are known as aquaporins and are crucial for maintaining cellular water balance. Which of the following is NOT a characteristic of aquaporin-mediated water transport?
Passive transport of water
Saturable transport kinetics
Driven by osmotic gradients
High selectivity for water
During DNA replication in prokaryotes, DNA is anchored to
the cell membrane
the nuclear membrane
the nucleolus
the histone proteins
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
Fluid mosaic model was given by
Beadle and Tatum
Jacob and Monod
Singer and Nicolson
Watson and Crick
Which part of the phospholipid is hydrophobic?
Phosphate head
Glycerol backbone
Fatty acid tails
Entire molecule
The plasma membrane consists mainly of
Phospholipids embedded in a protein bilayer
Proteins embedded in a phospholipid bilayer
Proteins embedded in a polymer of glucose molecules
Proteins embedded in a carbohydrate bilayer
