Biology Chapter 4 :

Chemical Composition of the Cell

4.6 The Importance of Chemical Composition in Cells

The chemical composition in cells are vital to the survival of the cells.

Deficiency in any one of it will affect the function of the cells.

Chemical Component Consequences of Deficiency

Carbohydrates- Respiration cannot occur. ( No Glucose )- No Storage of food in starch or glycogen form.- Plant cells irregular in shape. ( No Cellulose )

Proteins- Plasma membrane not properly formed.- No carrier and pore protein to transport substance

across the plasma membrane.- No new cells and tissue are formed. ( Inhibit body

growth )

Lipids- No cholesterol to stabilise the plasma membrane.- Biochemical reaction will proceed to slowly to

sustain life.

Enzymes - No chemical reactions in the cells.- All living processes stop functioning.

Nucleic Acids - No DNA and RNA in the cells.- Synthesis of proteins stop.

Water - No chemical reactions occur.- Cells die.