Science Biology MCQ-240

General Science-Biology Model Questions for UPSC, NDA, PSU, SSC, RRB, CDS, DelhiPolice, MPPSC Exams



DNA molecules are composed of deoxyribonucleotides of

 
 
 
 

DNA multiplication is concerned with

 
 
 
 

DNA nucleotides are attached by

 
 
 
 

The pacemaker of heart is

 
 
 
 

Doctors recommend that we should cook our food in oil rather than in vanaspati ghee. Why?

 
 
 
 

Dodder (cuscuta), mistletoe (Loranthus) and rafflesia are all

 
 
 
 

Ductless glands are known as

 
 
 
 

Duodenum is a part of

 
 
 
 

During elections a permanent, chemical mark is put at the base of the nail of index finger while exercising your franchise. This mark is not seen after two months or so because

 
 
 
 

During the day time plants

 
 
 
 

E. coli is used in

 
 
 
 

ECG is used for the diagnosis of ailment of the

 
 
 
 

Ecosystem has two components namely

 
 
 
 

Edible part of cauliflower is

 
 
 
 

Edible part of coconut is

 
 
 
 

Edible parts of mango and coconut are

 
 
 
 

Edible part of tomato is

 
 
 
 

Endocytosis is a process whereby a cell

 
 
 
 

Endodermis occurs in

 
 
 
 

Endospermic seeds are found in

 
 
 
 

Energy pyramids of an ecosystem tend to diminish at higher trophic levels. This is because at each successive level

 
 
 
 

Enzyme ptyalin is produced by

 
 
 
 

Enzymes are basically

 
 
 
 

Enzymes differ from ordinary catalysts in

 
 
 
 

Enzymes help in