The fluid mosaic model shown above describes the structure and function of a. nuclei. b. cell membranes. c. chloroplasts. d. chromosomes.

             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. 
 

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.