Question

The fluid mosaic model shown above describes the structure and function of
A.
nuclei.
B.
cell membranes.
C.
chloroplasts.
D.
chromosomes.

Answer 1

Answer:
             The corrrect option is B (Cell membrane). 

Explanation:
                   Fluid Mosaic Model was proposed by Fluid Mosaic Singer and GL Nicolson in 1972, to describe the structure of cell membrane. 

Statement:
                  "According to this model cell membrane is like a sea of lipids in                                       which protein molecules are floating".

Explanation:
                     Fluid mosaic model show that cell membrane is composed of:

1. proteins:
                    Two types of proteins are present in cell membrane.

a. Intrinsic protein:
                               Also known as integral proteins. These proteins are nestled into phospholipid and embedded in the cell membrane. 

b. Extrinsic protein:
                                 These proteins are also known as peripheral proteins. These are present on the surface of cell membrane. 

2. Phospholipid:
                            Each phospholipid is composed of head and two tails. The head is phosphate group which is hydrophilic while tail is composed of fatty acid which is hydrophobic. 

3. Carbohydrate molecules:
                                             It is the third major composition of plasma membrane. Two types of conjugating molecules are also present in plasma membrane.

Example:
                Glycolipids and glycoproteins.

4. Cholesterol:
                        Cholesterol is a type of steroid which help in regulating molecule entering and exiting cell. 
 

Answer 2

Answer:

The correct answer would be B.  cell membranes.

Fluid mosaic model is one of the models which explains the structure of functional cell membrane.

It explains cell membrane as the mosaic structure made up of components like phospholipid, proteins, cholesterol, and carbohydrates which provide the cell membrane a fluid nature.

Phospholipids are the prime component of the lipid bilayer. Proteins are embedded in the lipid bilayer structure and serve different functions like cell signaling.