Students are advised to practice the NCERT MCQ Questions for Class 12 Biology Chapter 8 Human Health and Disease with Answers Pdf free download is available here. MCQ Questions for Class 12 Biology with Answers are prepared as per the Latest Exam Pattern. Students can solve these Human Health and Disease Class 12 MCQs Questions with Answers and assess their preparation level.
Human Health and Disease Class 12 MCQs Questions with Answers
Solving the Human Health and Disease Multiple Choice Questions of Class 12 Biology Chapter 8 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Human Health and Disease Class 12 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 8 Biology Class 12 and cross-check your answers during preparation.
Select the correct answer
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
Answer: (c) Health is a state of complete physical, mental and social well-being
Question 2.
The organisms which cause diseases in plants and animals are called:
(a) pathogens
(b) vectors
(c) insects
(d) worms.
Answer
Answer: (a) pathogens
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
Answer: (d) Widal Test.
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) Smallpox.
(a) i and ii
(b) ii and iii
(c) iii and iv
(d) ii and iv
Answer
Answer: (d) ii and iv
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
Answer: (c) Salivary glands of mosquito
Question 6.
The disease chikungunya is transmitted by:
(a) Houseflies
(b) Aedes mosquitoes
(c) Cockroach
(d) Female Anopheles.
Answer
Answer: (b) Aedes mosquitoes
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
Answer: (a) Difficulty in respiration, fever, chills, cough, headache
Question 8.
Which type of immune response is responsible for the rejection of tissues/ organs in the patient’s body post¬transplantation?
(a) auto-immune response
(b) humoral immune response
(c) physiological immune response
(d) cell-mediated immune response.
Answer
Answer: (d) cell-mediated immune response.
Question 9.
In malignant tumours, the cells proliferate, grow rapidly and move to other parts of the body to form new tumours. This stage of disease is called:
(a) metagenesis
(b) metastasis
(c) teratogenesis
(d) mitosis.
Answer
Answer: (b) metastasis
Question 10.
When an apparently healthy person is diagnosed as unhealthy by a psychiatrist, the reason could be that:
(a) the patient was not efficient at his work
(b) the patient was not economically prosperous
(c) the patient shows behavioural and social maladjustment
(d) he does not take interest in sports.
Answer
Answer: (c) the patient shows behavioural and social maladjustment
Question 11.
Which of the following are the reason(s) for Rheumatoid arthritis ? Choose the correct option.
(i) Lymphocytes become more active
(ii) Body attacks self cells
(iii) More antibodies are produced in the body
(iv) The ability to differentiate pathogens or foreign molecules from self cells is lost
(a) i and ii
(b) ii and iv
(c) iii and iv
(d) i and iii
Answer
Answer: (b) ii and iv
Question 12.
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.
Answer
Answer: (c) Shaking hands with infected persons
Question 13.
‘Smack’ is a drug obtained from the:
(a) latex of Papaver somniferum
(b) leaves of Cannabis sativa
(c) flowers of Dhatura
(d) fruits of Erythroxylon coca.
Answer
Answer: (a) latex of Papaver somniferum
Question 14.
The substance produced by a cell in viral infection that can protect other cells from further infection is :
(a) serotonin
(b) colostrum
(c) interferon
(d) histamine.
Answer
Answer: (c) interferon
Question 15.
Transplantation of tissues/organs to save certain patients often fails due to rejection of such tissues/organs by the patient. Which type of immune response is responsible for such rejections?
(a) auto-immune response
(b) humoral immune response
(c) physiological immune response
(d) cell-mediated immune response.
Answer
Answer: (d) cell-mediated immune response.
Question 16.
Antibodies present in colostrum which protect the newborn from certain diseases is of:
(a) Ig G type
(b) Ig A type
(c) Ig D type
(d) Ig E type.
Answer
Answer: (b) Ig A type
Question 17.
Tobacco consumption is known to stimulate secretion of adrenaline and nor-adrenaline. The component causing this could be:
(a) Nicotine
(b) Tannic acid
(c) Curaimin
(d) Catechin.
Answer
Answer: (a) Nicotine
Assertion and Reason Type Questions
These questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses.
(a) If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.
(c) if Assertion is true but the Reason is false.
(d) If both Assertion and Reason are false.
Question 18.
Assertion: There is no chance of transmission of malaria to a man by the bite of a male Anopheles mosquito.
Reason: It carries a non-virulent strain of Plasmodium.
Answer
Answer: (c) if Assertion is true but the Reason is false.
Question 19.
Assertion: 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.
Answer
Answer: (a) If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
Question 20.
Assertion: Dope test is used to estimate the level of blood alcohol by analysing the breath of persons drinking alcohol.
Reason: A drunken person usually feels tense and less talkative.
Answer
Answer: (d) If both Assertion and Reason are false.
Question 21.
Assertion: Interferons are types of antibodies produced by bacteria-infected cells of the body.
Reason: Interferons stimulate inflammation at the site of injury.
Answer
Answer: (d) If both Assertion and Reason are false.
Question 22.
Assertion: LSD and marijuana are clinically used as analgesics.
Reason: Both these drugs suppress brain function.
Answer
Answer: (d) If both Assertion and Reason are false.
Question 23.
Assertion: After drinking, alcohol is changed to glucose in liver.
Reason: Liver cells are able to form glucose from alcohol by reverse fermentation.
Answer
Answer: (d) If both Assertion and Reason are false.
Question 24.
Assertion: Our body contains separate T-cells for every antigen the body encounters.
Reason: Each T-cell recognises a specific antigen.
Answer
Answer: (a) If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
Question 25.
Assertion: A person who has received a cut and is bleeding needs to be given anti-tetanus treatment.
Reason: Anti-tetanus injection provides immunity by producing antibodies for tetanus.
Answer
Answer: (c) if Assertion is true but the Reason is false.
Hope the information shared regarding the NCERT MCQ Questions for Class 12 Biology Chapter 8 Human Health and Disease with Answers Pdf free download is true and genuine as far as our knowledge is concerned. If you feel any information regarding CBSE Class 12 Biology Human Health and Disease MCQs Multiple Choice Questions with Answers is missing do reach us and we will look into it and add it accordingly.