www.bbcnoun.com.ng 
NSC221 8/10

Proteins constitute of the cell mass

10% to 20%

The process of protein synthesis is associated wit

Smooth endoplasmic reticulum

More than 95% of the cell’s energy release by

Mitochondria

The principal fluid medium of the cell is----------------- water

70-80%

The thickness of cell membrane is

About 7.5 nm

Cell contains highly organized living structures, called

Intracellular organelles

Two major parts of the cell are namely

Nucleus and the cytoplasm

Protoplasm is composed mainly of the following except

None of the above 

Electrolyte ions provide

Provide inorganic chemicals

Chemical reactions take place

among the dissolved chemicals