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 phenomenon.pf 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