The cell organelle pertaining to energy release process is 

(1) Lysosome  
(2) Chloroplast
(3) Mitochondria  
(4) Endoplasmic reticulum 

What happens when a cell placed in hypertonic solution ?

 (1) Endosmosis      
 (2) Exosmosis  
 (3) Deplasmolysis 
 (4) Imbibition

In which ofthe following organs, cell division does not takes place ?

(1) Bone marrow and Brain.
(2) Fertilized egg and Bone marrow.
(3) Cancer cells in different organs.
(4) Brain and Heart.

Which reaction take place in Mitochondria?

(1) Oxidative phosphorylation
(2) Photolysis
(3) Phtophosphorylation
(4) Starch synthesis

Give the name of scientist who proposed DNA molecules.

(1)  Robert Brown
(2)  Robert Hook
(3)  Leuvan Hook
(4)  Watson and crick