CBSE
Multiple Choice QuestionsAssertion: Mast cells in the human body release excessive amounts of inflammatory chemicals which cause allergic reactions.
Reason: Allergens in the environment on reaching human body stimulate mast cells in certain individuals.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : IgM is a type of immunoglobulin which cannot cross the placenta.
Reason : IgM is pentamer immunoglobulin, joined by J-chain
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false.
If both assertion and reason are false
Match the following and select the correct option.
Column-I Column- II
A. Emphysema (i) Increase in the concentration of non-biodegradable substances in food chains
B. ADA deficiency (ii) -1 antitrypsin
C. Eutrophication (iii) Bone marrow transplantation
D. Biomagnification (iv) Nutrient enrichment of a water body
A- (iii), B - (ii), C- (iv), D - (i)
A-(ii), B- (iii),C- (iv), D-(i)
A-(ii), B - (iv),C - (i), D - (iii)
A- (iv), B- (ii), C- (iii), D-(i)
Refer to the given figure depicting a diseased condition in humans and name the worm causing this disease.
Epidermophyton jloccosum
Ascaris lumbricoides
Wuchereria bancrofti
Entamocba histolytica
Assertion: Filarial worm is transmitted to humans by Culex mosquito.
Reason: Culex prefers to breed in fresh water.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Select the incorrect match.
Citric acid - Aspergillus niger
Streptokinase - Streptococcus
Butyric acid - Clostridium acetobutylicum
Cyclosporin A - Monascus purpureus
AIDS disease was first reported in
Russia
Germany
USA
France
Which of the following antibiotics is not correctly matched with the source from which it is obtained
Penicillin Penicillium chrysogenum
Bacitracin Bacillus licheniformis
Griseofulvin Penicillium griseofulvurm
Streptomycin Bacillus griseus
Refer to the given figure and choose the organism not related to the condition shown here.
Microsporum
Trichophyton
W. malayi
Epidermophyton
Which of the following pathogens is not transmitted by a vector
Salmonella typhi
Alpha virus
Plasmodium
Wuchereria bancrofti
