Science Biology MCQ-59

General Science-Biology Practice Test for PSU, UPSC, NDA, SSC, CDS, MPPSC, DelhiPolice, RRB Exams

Prokaryotic cells lack


Prothrombin which helps in clotting of blood is released by


Ptyalin is an enzyme produced in the


Pulses are a good source of


Pyorrhoea is a disease of the


Radial vascular bundles are those in which


Radioactivity is a the spontaneous emission of


Radish is a


Rain water helps to increase the… to some extent.


Ramapithecus and Cro-Magnon man are considered


Recent researches indicate close association of some specific genes with cancer. These genes are called


Red algae differ from the green algae and brown algae in having:


Red blood corpuscles are formed in the


Reproduction in most of the bacteria is by a process known as


Rhizome is an underground modification of


Rickets is a disease of the


Ring worm is due to


‘Lock Jaw’ is another name of


First vaccination was produced by


Vaccine for rabies was first produced by


RNA differs from DNA in containing


RNA is structurally susceptible to chemical and enzymatic degradation because of


RNA molecule is a single strand of ribo-nucleotides of


Rods and cones of eyes are modified


Roughage, a necessary constituent of diet, consists largely of indigestible