Biology MCQs

11. Bile is secreted by which of the following organs? (UPSC Prelims 1985)
[A] Liver
[B] Gall bladder
[C] Kidney
[D] Pancreas

Show Answer

12. Which of the following clearly define Lineage? (UPSC Prelims 1986)
[A] A straight line joining any two points on the globe
[B] The line of descendants of a particular ancestor
[C] The paleolithic age
[D] The linking of genes

Show Answer

13. Which of the following clearly define Pyrilla? (UPSC Prelims 1991)
[A] Disease of teeth and gums
[B] An insect pest
[C] A character of ancient Greek mythology
[D] A building heated by solar energy

Show Answer

14. Which one of the following diseases is caused due to defective genes? (UPSC Prelims 1992)
[A] Ulcer
[B] Haemophilia
[C] Diabetes
[D] Cancer

Show Answer

15. Ticks and mites belongs to which of the following classes? (UPSC Prelims 2002)
[A] Arachnids
[B] Crustaceans
[C] Insects
[D] Myriapods

Show Answer

16. In the context of the organic evolution, the loss of limbs of snakes is explained by which of the following phenomenon? (UPSC Prelims 2002)
[A] Use and disuse of organs
[B] adaptation to living in burrows
[C] natural selection
[D] inheritance of acquired characters

Show Answer

17. Which among the following organs secrete bile juice?
[A] Liver
[B] Pancreas
[C] Stomach
[D] Large intestine

Show Answer

18. What is another name for Koshland’s theory of enzyme action?
[A] Reduced fit theory
[B] Induced fit theory
[C] Enzyme coenzyme theory

[D] Lock and key theory

Show Answer

19. What is the shape of enveloped viruses?
[A] icosahedral
[B] helical
[C] roughly spherical
[D] complex

Show Answer

20. Covered smut of Sorghum is caused by which of the following?
[A] Sphacelotheca sorghi
[B] Sphacelotheca cruenta
[C] Sphacelotheca reiliana
[D] Tolyposporium ehrenbergii

Show Answer