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Q1. The sex of a child is determined by the

Rh factor of the parents

chromosomes of the mother

chromosomes of the father

blood group of the father

Q2. An organism that breeds true for a particular character producing identical gametes is called

hemizygous

homozygous

homogamous

heterozygous

Q3. Chromosomes not related to sex-inheritance are called

allosomes

centrosomes

autosomes

mesosomes

Q4. The cell undergoing a reduction division is called

meiocyte

germ cell

meiospore

oocyte

Q5. The number of chromosomes in a normal human body cell is

Q6. In human beings, sex is determined by the sex chromosomes X and Y. What would, then, be the genetic constitution of a normal woman?

Q7. What is the chromosome number in a human ovum?

none of these

Q8. Sons of a colour blind woman always colourblind but not the daughters. This implies that:

sex chromosomes are transferred only from mother to son

fewer sex chromosomes are transferred to the daughters

sex is determined by the mother

sex -linked characters find immediate expression in man

Q9. The universal recipient blood group is

Q10. In which one of the following is sex determined by environment?

Bonnelia

honeybee

maize

papaya

Q11. Hemophilia, a human disease, is caused by

mutant gene

fungal infection

bacterial infection

viral infection

Q12. A colour-blind man is married to a normal-visioned woman whose parents also had normal vision. What proportion of their children is likely to be colour-blind?

0 per cent

25 per cent

50 per cent

100 per cent

Q13. Sickle-cell anaemia, is caused by

malarial infection

iron deficiency

poor hygiene

none

Q14. A person with which one of the following blood group is considered a universal donor?

Q15. A person with blood group AB is sometimes called a universal recipient because of

lack of antibodies

lack of antigens

lack of both antigens and antibodies

the presence of antibodies

Q16. Phenylketonuria is a human disease. A person affected by the disease suffers from

kidney failure

liver failure

sexual infertility

mental idiocy

Q17. A child was found to be perfectly normal at birth. A few years later, however, his parents noticed that his activities were sluggish. He was, therefore, taken to a clinic where the doctor diagnosed him mentally retarded. What do you think he was suffering from?

epilepsy

alkaptonuria

Parkinson's disease

phenylketonuria

Q18. Which of the following fungi has been extensively used for genetical studies?

pink bread mold

green mold

bread mold

mushroom

Q19. The fungus, Puccinia graminis, causes a serious plant disease. Which of the following crops is affected by it?

maize

gram

rice

wheat

Q20. Lathyrism, a human disease causing paralysis of the lower limbs, is caused by

bacterial infection

consumption of kesari dal

viral infection

nervous failure

Q21. Quinine, the drug for malaria, is obtained from a plant. What part of the plant yields the drug?

leaves

root

fruits

stem bark

Q22. Which of the following is a substance abundantly available in the sea and administered in a certain deficiency disease?

iodine

flourine

vitamin A

iron

Q23. A preparation of living or killed micro-organisms or viruses used in the prevention of diseases through immunization is called

vaccine

toxoid

vitamin A

anti-toxin

Q24. The body loses a huge amount of water when a person suffers from severe diarrhoea. This acute water loss can be made good by

a slow and gradual intravenous administration of sterile distilled water

an intravenous drip comprising sodium chloride, potassium chloride, magnesium chloride, calcium chloride and glucose

an intravenous drip comprising glucose and normal saline

a slow and gradual intravenous administration of 0.1 % glucose dissolved in sterile distilled water as a ready source of energy

Q25. Triple vaccine is administered to a new born child to immunize it against

whooping cough, tetanus and measles

tetanus, diphtheria, smallpox and rubella

tetanus, diphtheria, measles and rubella

whooping cough, tetanus and diphtheria

Q26. Following replacement of breast feeding by less nutritive food, low in proteins and calories, infants below the age of one year suffer from

kwashiorkor

pellagra

rickets

marasmus

Q27. Where polished rice is the main cereal in their diet, people suffer from

pellagra

beri-beri

scurvy

osteomalacia

Q28. Children, who receive very little sunshine suffer from

sterility

dermatitis

scurvy

rickets

Q29. People who consume maize as the main cereal in their diet are prone to

scurvy

pellagra

beri-beri

kwashiorkor

Q30. Fat persons are less healthy and have a shorter life expectancy. because

fat inhibits many important enzymes of energy-yielding reactions in the body

accumulation of fat around the pericardial membrane interferes with the functional efficiency of the heart

the more weight the body has to carry, the greater the strain on the qeart and greater the chances of high blood pressure and heart attacks

the high level of cholesterol in the blood interferes with the efficient working of the liver, heart and kidney and so there are greater chances of hypertension, cirrhosis and renal failure

Q31. The deficiency of vitamin A causes

night blindness

dysentery

hair to fall

weakness

Q32. Ringworm is a disease caused by the

bacterial spores in the skin causing hair to fall out

hairy bristles of the caterpillar of a moth

arbovirus making the hair fall out of the skin

fungus that forms mycelia in the skin

Q33. The disease that is caused by viral infection is

common cold

cholera

typhoid

tetanus

Q34. Jaundice results from the malfunctioning of the

kidney

stomach

lungs

liver

Q35. The medicine for typhoid is

chloromycetin

vitamin A

chloroquin

sulpha-drugs

Q36. An increase in the number of leucocytes to 500,000/ cu. mm. and above indicates

leucopaenia

aleukemia

leucopoiesis

leukemia

Q37. Trypansomes are transmitted from animal to animal or man by the

sand fly

spirochaetes

bacilli

tsetse fly

Q38. Excessive consumption of alcoholic drinks causes damage to the

heart

kidney

liver

lungs

Q39. Syphilis is caused by

bacillus

vibrio

gonococcus

spirochaete

Q40. Elephantiasis, i.e., enormous enlargement of certain parts as that of leg, scrotum, penis and breast, etc. is caused by

the nematoda Wuchereria bancroft

the tapeworm Taenia solium

the fungus Microsporum

allergy

Q41. Which of the following worms enters the intestine through the skin?

hookworm

threadworm

tapeworm

ringworm

Q42. What is responsible for diphtheria and influenza?

bacteria and virus respectively

virus and bacteria respectively

bacteria

water pollution

Q43. The first surgical transplant of the human heart was performed by

William de Vries

Christian Barnard

Gerhard Hansen

Joseph Lister

Q44. The disease in which high levels of uric acid in the blood are characteristic of

arthritis

gout

rheumatism

rheumatic heart

Q45. Caner is 'a deadly disease because it has the ugly potentials of

having no resemblance to the normal cells of a tissue or organ

rapid growth to form a tumour

showing cells either very large or extremely small

dissemination to vital organs

Q46. Foot and mouth disease occurs in

cattle, sheep and pigs

cattle and sheep

cattle and pigs

cattle alone

Q47. The polio virus enters the body through

contaminated food and water

tick bites

mosquito bites

saliva and secretion from the nose

Q48. In the event of a snake bite, a piece of cloth is tied tightly around the wound to

prevent the poison from mixing with pure blood

prevent the poison from circulating to the brain causing cerebral haemorrhage

prevent the poison from spreading

prevent the poison from returning to the heart

Q49. Some fungi have been found to cause diseases in man. Which of the following do you think is one such?

Agaricus

Rhizopus

Puccinia

Aspergillus

Q50. A western country that was struck by Severe Acute Respiratory Syndrome (SARS) causing a few deaths is

South America

Canada

Mexico

Ireland

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