Class 12 Biology -Human Health and Diseases (MCQs)
Q1: The organisms which cause diseases in plants and animals are called:
(a) Pathogens
(b) Vectors
(c) Insects
(d) Worms
Q2: The sporozoites that cause infection, when a female Anopheles mosquito bites a person, are formed in:
(a) Liver of the person
(b) RBCs of mosquito
(c) Salivary glands of the mosquito
(d) Intestine of mosquito
Q3: Which of the following disease is not transmitted through contaminated water?
(a) Typhoid
(b) Diphtheria
(c) Amoebiasis
(d) Hepatitis A
Q4: Which one of the following diseases is spread by houseflies?
(a) Dengue
(b) Filariasis
(c) Amoebiasis
(d) Ascariasis
Q5: The term ‘Health’ is defined in many ways. The most accurate definition of the health would be:
(a) Health is the state of body and mind in a balanced condition
(b) Health is the reflection of a smiling face
(c) Health is a state of complete physical, mental and social well-being
(d) Health is the symbol of economic prosperity
Q6: Haemozoin is a
(a) precursor of haemoglobin
(b) the toxin released from Streptococcus infected cells
(c) the toxin released from Haemophilus infected cells
(d) the toxin released from Plasmodium-infected cells
Q7: Active immunity development is related to
(a) natural killer cells
(b) memory cells
(c) helper T-cells
(d) suppressor T-cells
Q8: AIDS is caused by HIV. Among the following, which one is not a mode of transmission of HIV?
(a) Transfusion of contaminated blood
(b) Sharing the infected needles
(c) Shaking hands with infected persons
(d) Sexual contact with infected persons
Q9: Which of the following is an occupational respiratory disorder?
(a) Silicosis
(b) Anthracis
(c) Emphysema
(d) Botulism
Q10: Vaccination protects a person from disease because it
(a) helps in better digestion
(b) stimulates the production of antibodies
(c) increases RBC count
(d) improves healing system
Q11: The disease chikungunya is transmitted by
(a) house fly
(b) Aedes mosquito
(c) cockroach
(d) female Anopheles
Answers:
1: (a) Pathogens
2: (c) Salivary glands of the mosquito
3: (b) Diphtheria (spreads through direct contact or through droplet infection)
4: (c) Amoebiasis
5: (c) Health is a state of complete physical, mental and social well-being
6: (d) toxin released from Plasmodium-infected cells
7: (b) memory cells
8: (c) Shaking hands with infected persons
9: (a) Silicosis
10: (b) stimulates the production of antibodies
11: (b) Aedes mosquito
ЁЯСЙSee Also:
Biodiversity and Conservation (MCQs)
Biotechnology and Its Applications (Very Short Answer Based Questions - Solved)
Organisms and Populations (MCQs)
Microbes in Human Welfare (MCQs)
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