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