481) What is the study of effect of light on various biological life process?
Photobiology
482) What is a Dental formula of man?
2123/2123
483) Which animal have no blood, but they respire?
Hydra
484) The deficiency of which leads to dental caries
Fluorine
485) Which structure is present in mitochondria?
Oxysomes
486) The anti-malarial drug Quinine is made from a plant. Which is that plant
Cinchona
487) Which is used to remove astigmatism for a human eye?
Cylindrical lens
488) What is the best method for improving the nutrient composition of a diet’?
By combining various foods
489) By whom was Artificial gene synthesis first done in laboratory?
Khurana
490) What is the number of chromosomes in a normal human body cell?
46
491) Which part of brain is center of thirst hunger and sleep?
Hypothalamus
492) Which tissue is responsible for the secondary growth?
Cambium
493) In human body which is the largest in size?
Liver
494) What is the largest gland in the human body?
Liver
495) Which is used extensively for genetic engineering in plant?
Agrobacterium tumefaciens
496) Animal goes under winter sleep due to low temperature, what is called
Aestivation
497) Where do Sweat glands occur in greatest number?
In the skin of the Armpits
498) Which cell organelles function as the powerhouse of a living cell?
Mitochondria
499) Which branch of science deals with the study of tissue found in the body of organism?
Histology
500) Alzheimer’s disease in human beings is characterized by which degeneration
Degeneration of nerve cells