Biology MCQs

31. Which is the driving force of evolution?
[A] Variation
[B] Mutation
[C] Extinction
[D] Adaptation

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32. Which of the following are the main sources of biofertilizers?
[A] bacteria
[B] cyanobacteria
[C] fungi
[D] All of the above

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33. Which of the following is an example of a loose association of nitrogen-fixing bacteria?
[A] Rhizobium
[B] Blue-Green algae
[C] Azotobacter
[D] Azospirillum

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34. What is the function of a polymerase chain reaction?
[A] catalyze the joining (ligation) of two large molecules
[B] amplify pieces of DNA
[C] Both 1 and 2
[D] Neither 1 nor 2

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35. Leptospirosis is a disease caused by ____:
[A] Fungus
[B] Protozoa
[C] Virus
[D] Bacteria

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36. Which enzyme in the human body helps break down carbohydrates?
[A] Lipase
[B] Amylase
[C] Peptidase
[D] Protease

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37. Panthera pardus is the scientific name of ____:
[A] Panther
[B] Leopard
[C] Lion
[D] Tiger

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38. Which organ is the main digester and absorber of food?
[A] Colon
[B] Stomach
[C] Liver
[D] Small intestine

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39. Which one of the following animals is sanguinivorous?
[A] Fruit-fly
[B] Mosquito
[C] House-fly
[D] Snail

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40. Which among the following does not have a cell wall?
[A] Euglena
[B] Mycoplasma
[C] Paramecium
[D] Gonyaulax

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