Science Biology MCQ-253

General Science-Biology Practice Questions for CDS, NDA, RBI, CivilsPrelims, JPSC, UPSC, SSC, UPPSC Exams

Blood does not coagulate inside the body due to the presence of


Leech is an ectoparasite on cattle which is


Which one of the following parts of the human brain is the regulating centre for swallowing and vomiting?


Which one of the following animals is devoid of lateral line sense organ?


Conglobate gland is a leaf like structure found in


Drug which helps to reduce anxiety and brings about calmness is


Broad spectrum antibiotics are produced by


The pigment that protect plants from harmful effect of ultraviolet rays is


Glycogen starch end cellulose are polymers of


Kidney can be taken from a dying person who has the


Opium is a plant product obtained from


What is the distance of ‘distinct vision’ for normal eye


Which of the following is not caused aggravated by air pollution?


When dust gets into the eye, the part that becomes inflamed and pink is the


Haemoglobin is a respiratory pigment present in all chordata except in larvae of


Ilium is a part of


The pores in leaves through which liquid water oozes out at times are called


Some oil-rich seeds can be stored for long periods without any change in their oil content because of the presence of


Which one of the following is called the amphibian in plant kingdom?


Find the odd one out:


The left aortic arch is observed in


Ozone affects human health by causing severe pulmonary oedema at a concentration of


If a bacterium cell divisions in every 20 minutes, how many bacteria will be formed in two hours?


Consider the following kinds of organisms:
1) Bacteria
2) Fungi
3) Flowering plants

Some species of which of the above kinds of organisms are employed as biopesticides?


What is the role of ultraviolet (UV) radiation in the water purification systems?

1) It inactivates/kills the harmful microorganisms in water.
2) It removes all the undesirable odours from the water.
3) It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.

Which of the statements given above is/are correct?