NCERT Class 12 Biology: Chapter –8 Human Health and Diseases Part 1
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Multiple Choice Questions
Question 1:
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.
Answer: (c)
Question 2:
The organisms which cause diseases in plants and animals are called:
a. Pathogens
b. Vectors
c. Insects
d. Worms
Answer: (a)
Question 3:
The chemical test that is used for diagnosis of typhoid is:
a. ELISA-Test
b. ESR - Test
c. PCR - Test
d. Widal-Test
Answer: (d)
Question 4:
Diseases are broadly grouped into infectious and non-infectious diseases.
In the list given below, identify the infectious diseases.
i. Cancer
ii. Influenza
iii. Allergy
iv. Small pox
(a) i and ii
(b) ii and iii
(c) iii and iv
(d)ii and iv
Answer: (d)
Question 5:
The sporozoites that cause infection when a female Anopheles mosquito bites a human being are formed in:
a. Liver of human
b. RBCs of mosquito
c. salivary glands of mosquito
d. intestine of human
Answer: (c)
Question 6:
The disease chikunguniya is transmitted by:
a. House flies
b. Aedes mosquitoes
c. Cockroach
d. Female Anopheles
Answer: (b)
Question 7:
Many diseases can be diagnosed by observing the symptoms in the patient. Which group of symptoms are indicative of pneumonia?
a. Difficulty in respiration, fever, chills, cough, headache
b. Constipation, abdominal pain, cramps, blood clots
c. Nasal congestion and discharge, cough, sore throat, headache
d. High fever, weakness, stomach pain, loss of appetite and constipation
Answer: (a)
Question 8:
The genes causing cancer are:
a. Structural genes
b. Expresser genes
c. Oncogenes
d. Regulatory genes
Answer: (c)