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Zoology Objective Questions and Answers for Competitive Exams | Page-3

(21) ‘ELISA’ test is employed to diagnose:
[A] Cancer
[B] Polio virus
[C] AIDS antibodies
[D] Tuberculosis bacterium

Comment

Answer: Option [D]
(22) Why excessive heating and repeated use of cooking oil is most undesirable?
[A] Loss and wastage of oil
[B] Nutrient value of food is lost
[C] Carcinogenic substances like benzpyrene are produced
[D] The oil vapours can cause indoor population

Comment

Answer: Option [C]

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(23) Which one of the following is a female sex hormone?
[A] Estrogen
[B] Insulin
[C] Oxytocin
[D] Androgen

Comment

Answer: Option [A]
(24) Labourers who do hard manual labour develop thick skin on their palms and soles due to:
[A] thick epidermis
[B] thick dermis
[C] thick subcutaneous tissue
[D] all of these

Comment

Answer: Option [D]
(25) AIDS virus has:
[A] single-stranded RNA
[B] double stranded RNA
[C] single stranded DNA
[D] double stranded DNA

Comment

Answer: Option [A]
(26) A ‘breath test’ used by traffic police to check drunken driving uses:
[A] turmeric on filter paper
[B] silica gel coated with silver nitrate
[C] potassium perma-nganate-sulphuric acid
[D] potassium dichromate-sulphuric acid

Comment

Answer: Option [D]
(27) Anglo-Nubian is a breed of:
[A] Sheep
[B] Goat
[C] Poultry
[D] Cattle

Comment

Answer: Option [B]
(28) What kind of soil is treated with gypsum to make it suitable for cropping?
[A] Acidic
[B] Alkaline
[C] Water-logged
[D] Soil with excessive clay content

Comment

Answer: Option [A]
(29) Typhoid fever is caused by-
[A] allergy
[B] fungus
[C] bacteria
[D] virus

Comment

Answer: Option [C]

Typhoid fever is a life-threatening illness caused by Salmonella Typhi bacteria. Paratyphoid fever is a life-threatening illness caused by Salmonella Paratyphi bacteria.

(30) Which of the following blood group is a universal recipient?
[A] A
[B] B
[C] AB
[D] O

Comment

Answer: Option [C]

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