511Which one of the following pairs is not correctly matched?
(A) Becquerel: Radioactivity
(B) Alexander Fleming: Penicillin
(C) Louis Pasteur: Blood groups
(D) William Harvey: Blood circulation
512Which one of the following plant nutrients is not supplemented in the soil for growing legumes?
(A) Nitrogen
(B) Potassium
(C) Phosphorus
(D) None of these
513Which one of the following statements is incorrect about laser?
(A) It is a technique for producing intense beams of light; ultraviolet or infrared radiation of different wavelength.
(B) Even in diamond laser beam can drill a hole.
(C) A variety of lasers have been made from solids like the ruby crystal and semi conducting materials; liquids and gases.
(D) All waves in laser; travel in phase.
514Which one of the following systems of the body is primarily attacked by the HIV?
(A) Cardiovascular
(B) Immune
(C) Respiratory
(D) Reproductive
515Which one of the following waves are used by the common TV remote control?
(A) Radio waves
(B) Lasers
(C) Infrared waves
(D) Ultrasonic waves
516Which organ in the human body is responsible for removing carbon dioxide from the body?
(A) Kidney
(B) Lungs
(C) Blood
(D) Ureter
517Which organ of the body produces the fluid known as bile?
(A) Liver
(B) Pancreas
(C) Gall bladder
(D) Kidney
518Which part of human body skin has greatest number Sweat glands?
(A) Forehead
(B) Forearm
(C) Palm of the hand
(D) Back
519Which vessel carries blood to the kidneys?
(A) Renal Arteries
(B) Renal Vein
(C) Both A and B
(D) Only A
520Which vitamin is needed to prevent Xero-phthalmia? –– ADVERTISEMENT ––
(A) A
(B) B
(C) C
(D) D
521Who among the following discovered the anti-rabies vaccine?
(A) Edward Jenner
(B) James Lind
(C) Louis Pasteur
(D) Robert Koch
522Who among the following had started vaccination?
(A) Jonas E. Salk
(B) Paul Muller
(C) Edward Jenner
(D) Robert Frost
523Who discovered cell in 1665?
(A) Robert Hook
(B) Robert Crook
(C) David Thomson
(D) Marie Francois
524Who had given the theory of evolution of species by natural selection?
(A) Darwin
(B) Mendel
(C) Dalton
(D) Morgan
525Who is considered as the father of western medicines?
(A) Hesiod
(B) Hippocrates
(C) Both 1 and 2
(D) Neither 1 nor 2
526Who is known as the father of genetics?
(A) Mendel
(B) Darwin
(C) Dalton
(D) Marie Curie
527Who said this statement? "I flatter myself having discovered the method that nature employs to purify air. It is vegetation."
(A) Antonine Laurent Lavoisier
(B) Joseph Priestley
(C) Louis Pasteur
(D) William Harvey
528Who suggested that life must have developed from the simple inorganic molecules like methane, hydrogen etc. which were present on the earth soon after it was formed?
(A) Darwin
(B) Marrie Curie
(C) Haldane
(D) None of the above
529Why it is not advisable to sleep under a tree at night?
(A) Release of less oxygen
(B) Release of more oxygen
(C) Release of carbon dioxide
(D) Release of carbon monoxide
530Why the white blood corpuscles are popularly called "soldiers of the body”?
(A) March at a regular pace
(B) Appear uniform
(C) Defend the body
(D) Disciplined
531Why was DDT banned which an organ chlorine compound, used first to control malaria, carried in mosquitoes and later to a variety to insect pests?
(A) It brings about a change in sex chromosomes
(B) It persists in the environment and bio-accumulates
(C) It increases its affinity hundred-fold for haemoglobin preventing its coupling with oxygen
(D) All of these
"Challenge and adversity are meant to help you know who you are. Storms hit your weakness, but unlock your true strength"