Biology MCQ
#8 Biology Class XII- Human Health and Diseases (NEET, MHTCET) MCQ
1) HIV that causes AIDS, first starts destroying
(a) helper T-lymphocytes(b) B-lymphocytes(c) leucocytes(d) thrombocytes
Answer
(a) helper T-lymphocytes
2) Antibodies in our body are complex
(a) glycoproteins(b) lipoproteins(c) steroids(d) prostaglandins
Answer
(a) glycoproteins
3) Lysozyme that is present in perspiration, saliva and tears, destroys
(a) certain types of bacteria(b) all viruses(c) most virus-infected cells(d) certain fungi
Answer
(a) certain types of bacteria
4) Increased asthmatic attacks in certain seasons are related to
(a) eating fruits preserved in tin containers(b) inhalation of seasonal pollen(c) low temperature(d) hot and humid environment.
Answer
(b) inhalation of seasonal pollen
5) To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?
(a) Physiological barriers(b) Physical barriers(c) Cytokine barriers(d) Cellular barriers.
Answer
(a) Physiological barriers
6) A person likely to develop tetanus us immunized by administering
(a) performed antibodies(b) wide spectrum antibotics(c) weakened germs(d) dead germs.
Answer
(a) performed antibodies
7) The term ‘Health’ is defined in many ways. The most accurate definition of the health would be: [NCERT Exemplar]
(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) Health is a state of complete physical, mental and social well-being
8) The clinical test that is used for diagnosis of typhoid is
(a) ELISA(b) ESR(c) PCR(d) Widal
Answer
(d) Widal
9) Diseases are broadly grouped into infectious and non-infectious diseases. [NCERT Exemplar]
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) (ii) and (iv)
10) The sporozoites that cause infection when a female Anopheles mosquito bites a person, are formed in [NCERT Exemplar]
(a) liver of the person(b) RBCs of mosquito(c) salivary glands of mosquito(d) gut of mosquito
Answer
(d) gut of mosquito
11) Dengue in humans is caused by
(a) Viruses(b) Bacteria(c) Fungi(d) Helminthes
Answer
(a) Viruses
12) The disease chikungunya is transmitted by [NCERT Exemplar]
(a) house fly(b) Aedes mosquito(c) cockroach(d) female Anopheles
Answer
(b) Aedes mosquito
13) Many diseases can be diagnosed by observing the symptoms in the patient. Which group of symptoms are indicative of pneumonia? [NCERT Exemplar]
(a) Difficulty in respiration, fever, chills, cough, headache(b) Constipation, abdominal pain, cramps, blood clots(c) Nasal congestion and discharge, cough, constipation, headache(d) High fever, weakness, stomach pain, loss of appetite and constipation
Answer
(a) Difficulty in respiration, fever, chills, cough, headache
14) In malignant tumors, the cells proliferate, grow rapidly and move to other parts of the body to form new tumors. This stage of disease is called [NCERT Exemplar]
(a) metagenesis(b) metastasis(c) teratogenesis(d) mitosis
Answer
(b) metastasis
15) When an apparently healthy person is diagnosed as unhealthy by a psychiatrist, the reason could be that [NCERT Exemplar]
(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
(c) the patient shows behavioural and social maladjustment
16) Which of the following are the reason(s) for rheumatoid arthritis? Choose the correct option.[NCERT Exemplar]
(i) The ability to differentiate pathogens or foreign molecules from self cells increases.
(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
(b) (ii) and (iv)
17) B-lymphocytes are associated with
(a) Humoral immunity(b) Inflammatory response(c) Cell mediated immunity(d) Phagocytosis
Answer
(a) Humoral immunity
18) The substance produced by a cell in viral infection that can protect other cells from further infection is [NCERT Exemplar]
(a) serotonin(b) colostrum(c) interferon(d) histamine
Answer
(c) interferon
19) 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? [NCERT Exemplar]
(a) Auto-immune response(b) Humoral immune response(c) Physiological immune response(d) Cell-mediated immune response
Answer
(d) Cell-mediated immune response
20) Which of the following antibodies form innate immunity?
(a) IgE(b) IgD(c) IgM(d) IgG
Answer
(d) IgG
21) Tobacco consumption is known to stimulate secretion of adrenaline and nor-adrenaline. The component causing this could be [NCERT Exemplar]
(a) nicotine(b) tannic acid(c) curamin(d) catechin
Answer
(a) nicotine
22) Which of the following is not a lymphoid tissue? [NCERT Exemplar]
(a) Spleen(b) Tonsils(c) Pancreas(d) Thymus
Answer
(c) Pancreas
23) Which of the following glands is large sized at birth but reduces in size with ageing?
[NCERT Exemplar]
(a) Pineal(b) Pituitary(c) Thymus(d) Thyroid
Answer
(c) Thymus
24) Haemozoin is a [NCERT Exemplar]
(a) precursor of hemoglobin(b) toxin released from Streptococcus infected cells(c) toxin released from Plasmodium infected cells(d) toxin released from Haemophilus infected cells
Answer
(c) toxin released from Plasmodium infected cells
25) Which of the following is not the causal organism for ringworm? [NCERT Exemplar]
(a) Microsporum(b) Trichophyton(c) Epidermophyton(d) Macrosporum
Answer
(d) Macrosporum
26) LSD is obtained from
(a) Eryythroxylon cocca(b) Cannabis sativus(c) Claviceps purpurea(d) Papaver somniferum
Answer
(c) Claviceps purpurea
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