50 Objective Questions on Zoology Part-1 (Civil Service Examination)

47. Which one of the following sets is correctly matched? [1995]

(1) Diphtheria, Pneumonia and Leprosy: Hereditary

(2) AIDS, Syphilis and Gonorrhoea: Bacterial

(3) Colour blindness, Haemophilia and Sickle cell anaemia: Sex linked

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(4) Polio, Japanese B encephalitis and Plague: Viral

(a) only 2 (b) only 3

48. A person with ‘AB’ blood group is sometimes called a universal recipient because of the [1995]

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(a) lack of antigen in his blood

(b) lack of antibodies in his blood

(d) presence of antibodies in his blood

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49. Which one of the following is a membrane that protects the developing embryo from desiccation? [1995]

(a) Amnion (b) Allantois

50. Which one of the following antimicrobial drugs, is suitable for treatment of both tuberculosis and leprosy? [1995]

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(a) Isoniazid (b) P-aminosalicylicacid

51. The normal temperature of human on Kelvin scale is [1995]

(a) 280 (b) 290

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52. Which of the following elements are present in all proteins? [1995]

1. Carbon 2. Hydrogen

3. Oxygen 4. Nitrogen

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Codes:

(a) 2 and 3 (b) 1, 2 and 4

53. Which one of the following hormones contains iodine? [1995]

(a) Thyroxine (b) Testosterone

54. By Weaving threads of physics, chemistry and biology into a rich tapestry, this remarkable scientist provided a unifying molecular view of the world. He touted the wonderful properties of Vitamin C, first as a cure of common cold and later as preventing agent against cancer.” One of science’s major figures of all time referred to above is [1995]

(a) G.N. Lewis (b) Linus Carl Pauling

55. “It begins as a single cell and grows into a merciless disease that claims millions of lives year after year. But scientists are steadily unlocking its mysteries and the fight against it, may now have reached a dramatic turning point. New discoveries promise better therapies and hope in the war against….”

The disease referred to in the above quotation is [1995]

(a) Cancer (b) AIDS

56. Of the four landmarks in medical history given below, which one was the first to take place? [1996]

(a) Organ transplant (b) Bypass surgery

57. According to the World Health Organisation (WHO), the disease which causes the death of the largest number of people today is [1996]

(a) AIDS (b) Tuberculosis

58. The nutritional deficiency condition that needs to be given top priority for remedial action in India today is [1996]

(a) Scurvy (b) Rickets

59. Match List-I with List-II and select the correct answer by using the codes given below: [1996]

List-1

A. Vitamin

B. Enzyme

C. Hormone

D. Protein

List-II

1. Pepsin

2. Carotene

3. Keratin

4. Progesterone

Codes:

(a) A-1; B-2;C-3; D-4

(b) A -2; B – 1; C -4; D – 3

(d) A – 1; B -2; C-4; D-3

60. Which of the following are associated with Diabetes mellitus, a common disease in adults? [1996]

1. Higher sugar level in blood

2. Lower sugar level in blood

3. Lower insulin level in blood

4. Higher insulin level in blood

Select the correct answer by using the codes given below:

Codes:

(a) 2 and 4 (b) 1 and 2

61. Consider the following statements. [1996]

AIDS -is transmitted

1. By sexual intercourse

2. By blood transfusion

3. By mosquitoes and other blood sucking insects

4. Across the placenta

(a) 1, 2 and 3 are correct

(b) 1, 2 and 4 are correct

(d) 1 and 3 are correct

62. Which of the following would lead to malnutrition? [1996]

1. Overnutrition

2. Undernutrition

3. Imbalanced nutrition

Select the correct answer by using the codes given below Codes:

(a) 2 alone (b) 2 and 3

63. People drinking water from a shallow handpump, are likely to suffer from all of the following diseases except [1996]

(a) Cholera (b) Typhoid

64. Besides proteins and carbohydrates, other elements of nutritional value found in milk, include [1996]

(a) calcium, potassium and iron

(b) calcium and potassium

(d) calcium and iron

65. Fat present below the skin surface in our body, acts as a barrier against [1996]

(a) Loss of heat from the body

(b) Loss of essential body fluids

(d) Entry of harmful micro-organisms from the environment

66. The major chemical compound found in kidney stones is: [1996]

(a) urea

(b) calcium carbonate

(d) calcium sulphate

67. The pituitary gland by virtue of its tropic hormones controls the secretary activity of other endocrine glands. Which one of the following endocrine gland can function independent of the pituitary gland? [1997]

(a) Thyroid (b) Gonads

68. Oxygen transportation in a human body takes place through [1997]

I. Blood

2. Lungs

3. Tissue

The correct sequence of transportation is

(a) 1, 2, 3 (b) 3, 1, 2

69. Corpus luteum is a mass of cells found in [1997]

(a) Brain (b) Ovary

70. Alpha-keratin is a protein, present in [1997]

(a) Blood (b) Skin

71. What is the average fat content of buffalo milk? [1997]

(a) 7.2% (b) 4.5%

72. The major component of honey is [1997]

(a) glucose (b) sucrose

73. Arteries supplying blood to the heart are called [1997]

(a) Carotid arteries (b) Hepatic arteries

74. Daily intake of proteins, recommended for a moderately active woman is [1997]

(a) 30 g (b) 37 g

75. Match List-I with List-II and select the correct answer by using the codes given below: [1997]

List- I- List-II

A. Malaria – 1. Bone marrow

B. Filaria – 2. Brain

C. Encephalitis – 3. Muscle

D. Leukaemia – 4. Lymph node

5. Blood cells

(a) A-5; B-3;C-2; D- 1

(b) A-5; B-4; C-2; D- 1

(d) A-5; B-4;C-l;D-2

76. Antigen is a substance which [1997]

(a) lowers body temperatures

(b) destroys harmful bacteria

(d) is used as an antidote to poison

77. The sequencing of the entire genome (the totality of all genes) of an organism was completed in 1996. The organism was: [1997]

(a) albino mouse (b) yeast

78. Examine the following three statements: [1998]

1. Processed meat is a perishable food

2. All perishable foods are packed in sealed tins

3. Sealed tins sometimes to do not contain processed meat

Which one of the following inferences can be drawn from the above statements?

(a) Sealed tins always contain perishable food

(b) Processed meat is sometimes not packed in sealed tins

(d) Non-perishable foods are never packed in sealed tins

79. Which one of the following type of micro organisms is most widely used in industries? [1998]

(a) Bacteria

(b) Bacteria and fungi

(d) Bacteria, microalgae and fungi

80. Match List-I with List-II and select the correct answer using the codes given below the lists:

List-I

Theory of mutation

Theory of evolution

One gene one enzyme hypothesis

D. Operon concept

List-II

Beadle and Tatum

Jacob and Monad

Darwin

de Vries

Codes:

(a) A-3; B-4; C-1; D-2

(a) A-4; B-3; C-1; D-2

(a) A-4; B-3; C-2; D-1

(a) A-3; B-4; C-2; D-1

81. A tree species in Mauritius failed to reproduce because of the extinction of a fruit-eating bird. Which one of the following was that bird? [1998]

(a) Dove (b) Dodo

82. The complete conversion of glucose, in the presence of oxygen, into carbon dioxide and water with release of energy is called [1998]

(a) aerobic respiration

(b) anaerobic respiration

(d) hydrolysis

83. Consumption of fish is considered to be healthy when compared to flesh of other animals because fish contains [1998]

(a) polyunsaturated fatty acids

(b) saturated fatty acids

(d) more carbohydrates and proteins

84. Match List-1 with List-II and select the answer using the codes given below:

[1998]

List-1 (Disease)

A. Malaria

B. Poliomyelitis

C. Tuberculosis

D. Ringworm

List-II (Organism)

1. Fungi

2. Bacteria

3. Virus

4. Protozoan

Codes:

(a) A-4; B-3; C-2; D-1

(b) A-4; B-3; C-1; D-2

(d) A-3; B-4; C-2; D-1

85. Haemophilia is a genetic disorder which leads to

(a) decrease in haemoglobin level

(b) rheumatic heart disease

(d) non-clotting of blood

86. Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on the phenomenon of [1999]

(a) total internal reflection

(b) interference

(d) polarization

87. When ants bite, they inject [1999]

(a) glacial acetic acid (b) methanol

88. In eye donation, which one of the following parts of donor’s eye is utilized? [1999]

(a) Iris (b) Lens

89. Match the hormones in List-1 with items in List-II and select the correct answer using the codes given below: [1999]

	List-1		List-II
A.	Adrenaline	1.	Anger, fear, danger
B.	Estrogen	2.	Attracting partners through sense of smell
C.	Insulin	3.	Females
D.	Pheromones	4.	Glucose

(a) A-4; B-3; C-2; D-1

(b) A-1; B-3; C-2; D-4

(d) A-3; B-1; C-2; D-4

90. Match List-I (Drugs/Chemicals) with List -II (Their uses) and select the correct answer using the codes given below [1999]

List-I

A. Atropine

B. Ether

C. Nitroglycerine

D. Pyrethrin

List-II

1. Local anaesthesia

2. Heart trouble

3. Dilation of pupil

4. Mosquito control

Codes:

(a) A-1; B-3;C-2; D-4

(b) A-1; B-3; C-4; D-2

(d) A-3; B-1; C-2; D-4

91. Which one of the following genetic diseases is sex-linked? [1999]

(a) Royal haemophilia

(b) Tay-Sachs disease

(d) Hypertension

92. Lathyrism is caused by excessive consumption of [1999]

(a) khesaridal (b) mustard oil (c) polished rice (d) mushrooms

93. Assertion (A): In human being, the females play a major role in determining the sex of the offspring. Reason (R): Women have two ‘X’ chromosomes. [2000]

Codes:

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not a correct explanation of A

(d) A is false but R is true

94. At which stage in its life cycle, does the silk worm yield the fibre of commerce? [2000]

(a) Egg (b) Larva

95. Match List-I (Disease) with List-II (Types of disease) and select the correct answer using the codes given below: [2000]

List-I – List-II

A. Haemophilia – 1. Deficiency disease

B. Diabetes – 2. Genetic disease

C. Rickets – 3. Hormonal disorder

D. Ringworm – 4. Fungal infection

(a) A-2; B-3;C-4; D- 1

(b) A -2; B-3;C- 1; D-4

(d) A-3;B-2;C-4;D-1

96. The blood glucose level is commonly expressed as [2000]

(a) mm. of Hg

(b) milligram per decilitre

(d) gram (mg/dl) per litre

97. Match List-I (Endocrine glands) with List-II (Hormones secreted) and select the correct answer using the codes given below: [2000]

List-I – List-II

A. Gonads – 1. Insulin

B. Pituitary – 2. Progesterone

C. Pancreas – 3. Growth hormones

D. Adrenal – 4. Cortisone

(a) A-3; B-2;C- 4; D – 1

(b) A-2; B-3; C-4; D- 1

(d) A-3; B-2; C- 1; D-4

Answers:

47. (d) Diphtheria, Leprosy, Plague are Bacterial diseases.

AIDS, Polio, Pneumonia, Gonorrhoea, Syphilis- Viral disease. Japanese B encephalitis – Protozoan disease. Colour blindness and Haemophilia – Sex linked disease. Sickle cell anaemia is a genetic disease in which RBC became sickle shaped.

48. (b) Person having blood group ‘AB’ is called universal recipient because the ‘AB’ blood group has no antibody in the blood plasma. So, the person can accept any type of blood group (i.e. A, B and O)

49. (a) The amnion is a membrane that protects the developing embryo by a fluid-filled space called amniotic cavity. Amnion is formed above the embryo.

50. (d) Leprosy is caused by Mycobacterium leprae and tuberculosis is caused by Mycobacterium tuberculosis. The effective drug for Mycobacterium species is Rifampicim.

51. (d) Normal body temperature of human is 37° C. But when we convert 37° C into Kelvin it becomes 310 K because 0° C = 0°C + 273 = 273 K

37° C = 37° + 273 = 310 K

52. (d) Protein is a complex organic compound of Carbon, Hydrogen, Oxygen and Nitrogen. It is a long chain molecule composed of amino acids ( R – CH ( NH,) COOH) joined by peptide bonds.

53. (a) Thyroxine hormone and tri-iodothyronine hormone are secreted by thyroid follicular cells of thyroid gland. The major component of thyroxine hormone is iodine. Deficiency of iodine causes goitre in human.

54. (b) Linus Carl Pauling is much known for his controversial thesis proposing that high dose of vitamin- C would help not only in prevention of common cold but also in prevention of cancer.

Linus Carl Pauling is the only person to have received two unshared Nobel prizes in 1954 for chemistry and in 1962 for peace.

55. (a) Cancer is a disease characterized by abnormal cell growth and later results to tumour when a tumour successfully spreads to other parts of the body and starts invading and destroying other healthv tissues. Cancers are classified as carcinomas, sarcomas and melanoma according to the tissues.

56. (d) Invention – Year – Scientist

Organ transplant – 1959- Joseph E. Murray

Bypass surgery – 1960- Albert Einstein

Test tube baby – 1978 – Louise Joy Brown

Plastic surgery – 1827- Dr. John peter Mettauer

57. (b) Tuberculosis is caused by bacteria Mycobacterium tuberculosis. Infection is caused by drinking infected milk, breathing in infected dust, droplet infection through having germs coughed in the face.

58. (c) Xerophthalmia is caused by vitamin A. Generally this disease is found in poorer section of the society. The symptom includes night blindness and eye irritation.

59. (b) Vitamin A group includes retinol. Their parent carotene is a vitamin substance as p- carotene.

Pepsin is an enzyme produced in stomach, which digest protein.

Progesteron is a hormone, produced in human ovary. Keratin is a protein. The main component of hair and nail is keratin.

60. (d) Diabetes mellitus is caused due to deficiency of insulin hormone. The hormone insulin maintains the blood sugar in body. Deficiency of insulin in human body causes increase the sugar level in blood, which leads to Diabetes mellitus.

61. (b) AIDS is a viral disease. The virus is called HIV. This disease transmitted by sexual intercourse, blood transfusion and from pregnant mother to baby through placenta.

62. (d) Malnutrition is defined as the insufficient, excessive or imbalanced consumption of nutrients. So under nutrition, over nutrition and imbalanced nutrition leads to malnutrition.

63. (d) Cholera, Typhoid and Jaundice are water born diseases. In shallow hand pumps there is possibility of microbial contamination (bacteria) to water. But fluorosis occurs due to excess amount of fluorine found in water.

64. (b) Besides proteins and carbohydrates, approximately 67% of calcium, 35% of magnesium and 44% of the phosphorus found in milk.

65. (a) Fat present below the skin surface in our body, act as a insulator against loss of heat from the body. The deposited fat works as barrier, which prevents loss of heat.

66. (c) The composition of kidney stone is

Calcium oxalate – 80%

Uric acid – 5%

Amino acid cystine – 2 %

Magnesium and ammonium phosphate – 13%

67. (d) Parathyroid gland is not controlled by pituitary. The parathormone which secrets from this gland regulates calcium and phosphorus ion in body

68. (c) In human body oxygen first comes through lungs. From lungs to different tissue via blood.

69. (b) Corpus luteum is a mass of cells found in ovary. It produces progesterone hormone. If the ovary is not fertilised, the corpus-luteum degenerates after about two weeks and is gradually replaced by ordinary ovary tissue.

70. (b) Alpha keratin is a protein, found in skin, hair, nail, claws and hooves of animals.

71. (a) Average fat content in buffalo milk is 7.2% and average fat content in cow milk is 4.4%. As per the nutrient components, buffalo milk contains all the nutrients in higher proportion than cow’s milk.

72. (d)The major component of honey is fructose.

Composition of honey in (percentage)

Fructose- 38.2

Glucose – 31 –

Water- 17.1

Maltose- 7.2

Carbohydrate-4.2

Sucrose -1.5

Minerals-0.5

73. (c) Coronary arteries supply blood to heart. Carotid arteries supply the blood to head region. Hepatic arteries supply to liver and pulmonary arteries supplies blood to the lungs.

74. (d) Daily intake of protein for active woman is 46 gram. But at pregnant women the protein requirement increase to 47 – 60 gm per day.

75. (b) Malaria is the parasitic disease spreads through the sucking of blood through mosquitoes. The malaria parasite invades blood cells. The virus of encephalitis most active in brains. Filaria parasite found in blood lymph and leukaemia is cancer mainly the abnormal cell growth in bone narrow.

76. (c) Antigen is a foreign molecule that invade the body of an organism. Antigen also induce immune response to stimulate lymphocyte to produce antibody. The majority of them are proteins and polysaccharides found on the wall of bacteria and on the cell coats of virus.

77. (d) The sequencing of the entire gensome (the totallity of all genes) was completed in 1996 of Plasmodium vivax.

78. (c) We can draw the inference that processed meat is always packed in sealed tins.

79. (d) Bacteria, microalgae and fungi is most widely used in industries. Bacteria like Lactobacillus sp. is used in manufacturing of vinegar and alcohol by fementation process.

Most of algae are used as single cell protein (i.e. Spirulina).

Different drugs like penicillin are manufactured from fungi Penicillium notatum.

80. (b) Theory of mutation is postulated by de Vries. Theory of evolution is by Chart’s Darwin. Operon concept is given by Jacob and Monad. One gene and one enzyme hyoptheisis is proposed by Beadle and Tautum.

81. (b) Dodo birds species existed only on the island of Mauritius. Due to its short wings and bulky body the Dodo birds could not fly or flee in the face of danger. So human used to kill them for food. Later the species became extinct from Mauritius. This bird species was helpful in pollinating and propagating seed of trees.

82. (a) The complete conversion of glucose in presence of

oxygen, into carbon dioxide, water and release energy is called aerobic respiration. Anaerobic respiration occurs in the absence of oxygen.

83. (a) Polyunsaturated fatty acid is an anti oxidant, which helps in building of tissues.

84. (a) Malaria parasite is an protozoan. Tuberculosis is a bacteria. Ring worm is a fungus and Poliomyelitis is a virus.

85. (d) Haemophilia is a sex-linked recessive disorder. Clotting of blood is abnormally delayed that even a simple or small cut will result non stop bleeding in affected individual.

86. (a) Endoscopy refers to looking inside the body through endoscope. Endoscope is an instrument used to examine interior of hollow organ of the body through bore scope technique.

87. (c) When ants bite, they inject formic acid in the muscle tissue. This formic acid is found at the mandible of ants.

88. (c) Generally blindness is caused by the dryness and hardness of cornea. Cornea is a clear layer which helps passing of light. It is an outer layer and can be transfer from one person to another.

89. (c) Adrenaline is the hormone prepares the body to deal with anger, fear and danger. Estrogen hormone releases from ovary of female. Insulin controls the level of glucagon in blood. Pheromones attracts partners through sense of smell.

90. (d) Ether is used as an anesthesia at the time of surgery to prevent pain.

Atropine is used as eye drops to dilate the pupil before eye examination.

Nitroglycerine is widely used in the treatment of heart. Pyrethrin is biodegradable, non-persistent pesticide which is used to kill mosquitoes, fleas and other insects.

91. (a) Royal haemophilia is sex- linked disease. Clotting of blood is abnormally delayed even small cut will result in non stop bleeding in the affected individual. Queen Victoria was a carrier of this disease and produce haemophilic descendents, so haemophilia is a royal disease.

92. (a) Lathyrism is caused by excessive consumption of khesari dal. Lathyrism gets its name from scientific name of khesari dal which is Lathyrus sativus. The Symptom of the disease is paralysis of both the lower limbs.

93. (d) Assertion is false. In human, sex determination of offspring depends on male because male sperm contains XY chromosome, whereas female has XX chromosome in their ovum.

94. (c) Silk worm yield the fibre from pupa stage, which is commercially used to produce clothes.

95. (c) Haemophilia – Genetic disease caused in sex- linked gene.

Diabetes – Hormonal disorder disease caused by imbalance of insulin hormone.

Rickets – Nutritional deficiency disease caused by deficiency of vitamin-D.

Ringworm – Caused by fungus.

96. (b) The glucose level in blood is commonly expressed as milligram per decilitre.

97. (c) Progesterone secrets from gonads. Growth hormone secrets from pituitary gland. Insulin hormone secrets from pancreas. Cortisone secrets from adrenal gland.