GK-BD

The credit of developing the polio vaccine goes to___. Option A: Jones Salk , Option B: Alb E. Sabin , Option C: J. I. Baird, Option D: J. Perkins, correct answer is: Jones Salk

The clear sky looks blue because of ____________ . Option A: reflection of light , Option B: refraction of light , Option C: diffraction of light, Option D: dispersion of light, correct answer is: dispersion of light

The gas used for artificial ripening of green fruit Option A: ethane , Option B: ethylene , Option C: oxytocin, Option D: carbon dioxide, correct answer is: ethylene

A group of scientists in Bangladesh has recently decoded the genome of- Option A: papaya , Option B: wheat , Option C: cow, Option D: buffalo, correct answer is: buffalo

Small amount of iodine is necessary in our diet to____. Option A: Prevent pellagra , Option B: Compensate for underactive thyroid gland , Option C: Stimulate clotting of blood, Option D: Stimulate pituitary gland, correct answer is: Compensate for underactive thyroid gland

What is the function of a pacemaker? Option A: it decreases heart beat , Option B: it regulates heart beat , Option C: it increases heart beat, Option D: it accelerates blood supply to heart, correct answer is: it regulates heart beat

What is the biggest organ of the human body? Option A: the skin , Option B: the head , Option C: the hair, Option D: the muscle, correct answer is: the skin