Class 12 Biology NCERT Solutions from Chapter Health and Diseases

Questions

226 Antibodies present in colostrum which protect the new born from certain diseases is of

1 Ig G type

2 Ig E type

3 Ig D type

4 Ig A type

View Answer

Answer: Ig A type

227 When an apparently healthy person is diagnosed as unhealthy by a psychiatrist, the reason could be that:

1 the patient was not efficient at his work

2 the patient was not economically prosperous

3 the patient shows behavioural and social maladjustment

4 he does not take interest in sports

View Answer

Answer: the patient shows behavioural and social maladjustment

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228 The sporozoites that cause infection when a female Anopheles mosquito bites a human being are formed in:

1 Liver of human

2 RBCs of mosquito

3 salivary glands of mosquito

4 intestine of human

View Answer

Answer: salivary glands of mosquito

229 The organisms which cause diseases in plants and animals are called:

1 Pathogens

2 Vectors

3 Insects

4 Worms

View Answer

Answer: Pathogens

230 Many diseases can be diagnosed by observing the symptoms in the patient. Which group of symptoms are indicative of pneumonia?

1 Difficulty in respiration, fever, chills, cough, headache

2 Constipation, abdominal pain, cramps, blood clots

3 Nasal congestion and discharge, cough, sorethroat, headache

4 High fever, weakness, stomach pain, loss of appetite and constipation

View Answer

Answer: Difficulty in respiration, fever, chills, cough, headache

231 Smack’ is a drug obtained from the:

1 latex of Papaver somniferum

2 leaves of Cannabis sativa

3 flowers of Dhatura

4 fruits of Erythroxyl coca

View Answer

Answer: latex of Papaver somniferum

232 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?

1 auto-immune response

2 humoral immune response

3 physiological immune response

4 cell-mediated immune response

View Answer

Answer: cell-mediated immune response

233 Anti venom against snake poison contains:

1 Antigens

2 Antigen-antibody complexes

3 Antibodies

4 Enzymes

View Answer

Answer: Antibodies

234 One of the following is not the causal organism for ringworm

1 Microsporum

2 Trichophyton

3 Epidermophyton

4 Macrosporum

View Answer

Answer: Macrosporum

235 The genes causing cancer are

1 structural genes

2 expressor genes

3 oncogenes

4 regulatory genes

View Answer

Answer: oncogenes

236 Which of the following glands is large sized at birth but reducies in size with aging?

1 Pineal

2 Pituitary

3 Thymus

4 Thyroid

View Answer

Answer: Thymus

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