(a) Carbon dioxide
(b) Nitrogen dioxide
(c) Carbon monoxide
(d) Sulphur dioxide
282 Q) "A person passes much urine and drinks much water but his blood glucose level is normal. This condition may be due to "
(a) hypersecretion of androgens from testes
(b) hypersecretion of thyroxine from thyroid gland
(c) hyposecretion of vasopressin from posterior pitutiary gland
(d) hyposecretion of corticosteroids from adrenal gland
283 Q) The word "Taxonomy" was coined by
(a) C Linnaeus
(b) Theophrastus
(c) De Candolle
(d) Lamarck
284 Q) "Assertion (A) Malaria is always associated with anaemia.
Reason (R) Release of merozoites and an antibody produce by plasmodium cause wholesome destruction of RBCs."
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
285 Q) "Assertion (A) The smog is mainly formed during daytime having clear sky and pollution free atmosphere.
Reason (R) The UV rays of sunlight catalyses the reaction of NOx, Hydrocarbons, etc contained in polluted air."
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
286 Q) Agar-agar from the cell wall of red alga, Gracilaria sp. is composed of
(a) galactose
(b) mannose
(c) fructose
(d) sucrose
287 Q) Plants genes of endangered species are stored in
(a) gene library
(b) gene bank
(c) herbarium
(d) None of these
288 Q) Which one among the following gases readily combines with the haemoglobin of the blood?
(a) Methane
(b) Nitrogen dioxide
(c) Carbon monoxide
(d) Sulphur dioxide
289 Q) Which of the following causes leads to mumps in human beings?
(a) Sublingual salivary gland infection
(b) Parotid salivary gland infection
(c) Maxillary salivary gland infection
(d) All of the above
290 Q) In humans, which one among the following, with reference to breathing, is correct?.
(a) During inhalation, diaphragm relaxes
(b) During exhalation, thorax cavity expands
(c) During inhalation, intra-pleural pressure becomes more negative
(d) Unlike inhalation, normal exhalation is an active process
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