History of Development of the Fluid Mosaic Model

Q.

Question 7

Who proposed the fluid mosaic model of plasma membrane?

(a) Camillo Golgi (b) Schleiden and Schwann

(c) Singer and Nicolson (d) Robert Brown

Q. ‘Sandwich Model’ for cell membrane was given by __________.

1. Davson and Danielli(1935)
2. Singer and Nicolson (1972)
3. Gorter and Grendel (1925)
4. Overton (1875)

Q.

What types of protein polymers exist?

Q.

What is an example of permeability?

Q.

How plasma membrane brings the exchange of materials between cells and the surrounding medium as well as between membrane-bound cell organelles and cytoplasm?

Q.

What are proteins as biomolecules?

Q.

What is the difference between ligands and receptors?

Q. Each phospholipid in the plasma membrane bilayer has

1. Hydrophobic heads and Hydrophilic tails
2. Hydrophilic heads and Hydrophobic tails
3. Both the head and the tail are hydrophilic
4. Both the head and the tail are hydrophobic

Q.

Why do molecules need a carrier protein?

Q.

According to fluid mosaic model, the Plasma membrane is made up of:

1. Phospholipids and oligosaccharides

2. Phospholipids and hemicellulose

3. Phospholipids and integral proteins

4. Phospholipids, Extrinsic proteins and Intrinsic proteins

Q.

Does glucose utilizes channel proteins or carrier proteins?

Q. Human and mouse cells are treated with red and green fluorescent dyes respectively and are made to fuse. The resultant cells are kept at ${37}^{o}C$. The distribution of dye on the surface of the cells will be

1. 
2. 
3. 
4. 

Q.

Which type of substance movement should be facilitated?

Q.

Keratins and albumins are examples of

1. Simple proteins

2. None of the above

3. Conjugated proteins

4. Derived proteins

Q. Who proposed the fluid mosaic model of the plasma membrane and when? Describe the fluid mosaic model of the plasma membrane with the help of the diagram.

Q. In fluid mosaic model of plasma membrane

1. Upper layer is non-polar and hydrophilic
2. Polar layer is hydrophobic
3. Phospholipids form a bimolecular layer in middle part
4. Proteins form a middle layer

Q. Different cells have different sizes. Arrange the following cells in an ascending order of their size. Choose the correct option among the followings

i. Mycoplasma

ii. Ostrich eggs

iii. Human RBC

iv. Bacteria

Options:

1. i, iii, iv & ii
2. iii, ii, i & iv
3. i, iv, iii & ii
4. ii, i, iii & iv

Q. The fluid mosaic model of the plasma membrane was proposed by

1. Singer and Garth L. Nicolson
2. Camillo Golgi
3. Danielli and Davson
4. Robertson

Q. What is the role of fat & protein in cell membrane?

Q. Lecithin is

1. Glycolipid
2. Carbohydrate
3. Steroid
4. Phospholipid

Q. Describe the fluid mosaic model of cell membrane.

Q. Which of the following describes the fluid-mosaic model of the plasma membrane structure?

1. Phospholipid monolayer with embedded proteins
2. Phospholipid bilayer with embedded proteins
3. Phospholipid trilayer with embedded proteins
4. Triglyceride bilayer with embedded proteins

Q. In Singer-Nicolson fluid mosaic model of the cell membrane, extrinsic proteins are

1. superficially arranged and cannot be separated easily.
2. tightly attached to intrinsic proteins and cannot be separated easily
3. tightly attached to intrinsic proteins but can be separated easily
4. superficially arranged and can be separated easily

Q. Assertion :The quasifluid nature of lipid enables lateral movement of proteins within the overall bilayer. Reason: This ability to move within the membrane is called fluidity and is important for cell growth.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Which of the following describes the fluid-mosaic model of the plasma membrane structure?

1. Phospholipid monolayer with embedded proteins
2. Phospholipid bilayer with embedded proteins
3. Phospholipid trilayer with embedded proteins
4. Triglyceride bilayer with embedded proteins

Q. The fluid mosaic model of plasma membrane was given by

1. Robertson
2. Gorter and Grendel
3. Singer and Nicholson
4. Robert Hooke

Q.

According to fluid mosaic model, the Plasma membrane is made up of:

1. Phospholipids and oligosaccharides

2. Phospholipids and hemicellulose

3. Phospholipids and integral proteins

4. Phospholipids, Extrinsic proteins and Intrinsic proteins

Q. Which stain is used for electron microscopy?

1. PAS
2. Aurantia
3. Para Rosailin
4. Osmium tetraoxide

Q. Fluid mosaic model of cell membrane proposed that a lipid bilayer

1. Is coated by a layer of proteins on each face.
2. Has proteins embedded in itself and none on the surface.
3. Is coated by a layer of proteins on the outer surface only.
4. Has both embedded and outer proteins.

Q.

Which organisms can carry out life processes through a simple diffusion process?