Biology MCQs

11. Which one of the following plants can fix nitrogen from air? (UPSC Prelims 1992)
[A] Rice
[B] Wheat
[C] Pea
[D] Maize

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12. Which of the following define the hormone insulin? (UPSC Prelims 2004)
[A] Glycolipid
[B] Fatty acid
[C] Peptide
[D] Stero

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13. Which among the following is an autotroph?
[A] Honey bee
[B] Algae
[C] Grasshopper
[D] Butterfly

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14. What is the pH range of blood?
[A] 6.55-6.85
[B] 1.55-3.55
[C] 10.5-12
[D] 7.35-7.45

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15. Which tissue of plant is used to transport food to various parts?
[A] Xylem
[B] Parenchyma
[C] Sclerenchyma
[D] Phloem

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16. Which of the following is a reducing sugar?
[A] β-methyl galactosidase
[B] Sucrose
[C] Gluconic acid
[D] Galactose

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17. What are the inclusion bodies of the measles virus?
[A] intracytoplasmic
[B] intranuclear
[C] both (a) and (b)
[D] none of these

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18. Which of the following structures is responsible for the motility of bacteria?
[A] pilli
[B] flagella
[C] sheath
[D] capsules

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19. Which of the following are the roots of gymnosperms?
[A] Tap root
[B] Adventitious roots
[C] Rhizoid
[D] Rhizophores

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20. When did gymnosperms originate?
[A] Palaeozoic
[B] PreCambrian
[C] Cenozoic
[D] Mesozoic

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