Biology MCQs

1. An example of Protozoa, Anthropod, Aves, Mammal & Reptile is respectively __________?
[A] Amoeba, Lizard, Scorpion , Bat, Hen
[B] Amoeba, Scorpion, Hen, Bat , Lizard
[C] Amoeba, Scorpion, Bat ,Hen, Lizard
[D] Lizard, Amoeba, Scorpion, Bat ,Hen

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2. Where does the formation of Urea takes place in our body ?
[A] Pancreas
[B] Kidney
[C] Liver
[D] Lungs

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3. Japanese encephalitis is a disease caused by __ ?
[A] Virus
[B] Protozoa
[C] Bacteria
[D] Fungi

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4. Which among the following enzyme plays an important role in adding the building blocks to the primer in a sequence determined by the DNA template?
[A] Helicase
[B] Primase
[C] Polymerase
[D] Diastase

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5. The Indian Pipe Plant or Monotrapa can be best placed in which among the following groups?
[A] Parasite
[B] Saprophyte
[C] Insectivorous
[D] Lithophyte

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6. With reference to classification of the animals, which among the following groups represents Elasmobranchs?
[A] Shark, Skates and Rays
[B] Shark, Rays and Dolphins
[C] Shark, Skates and Dolphins
[D] Skates, Dolphins and Rays

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7. Which of the following is the smallest known prokaryotic organism?
[A] Mycoplasma
[B] Bacteria
[C] Chlorella
[D] Microcystis

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8. Which of the following is the first formed primary xylem elements?
[A] Protoxylem
[B] Xylem parenchyma
[C] Metaxylem
[D] Xylem fibres

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9. At which of the following stages the sex of the offspring is determined?
[A] The conception takes place
[B] The sperm fertilises the ovum
[C] The embryo is partially developed
[D] The end of gestation period is near

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10. The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by? (UPSC Prelims 2000)
[A] a decrease in the supply of oxygen
[B] minor wear and tear of muscle fibres
[C] the depletion of glucose
[D] the accumulation of lactic acid

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