Microorganisms friends and foe Worksheet-7

Microorganisms friends and foe Worksheet-7

Multiple Choice Questions:

31. Microorganism are classifies under ______ group.

(A) One              (B) Two             (C) Three           (D) Four

32. Viruses reproduce only inside the cells of the ______.

(A) Plants          (B) Animals      (C) Bacteria      (D) Host

33. Which of the following disease is caused by virus?

(A) Polio                                         (B) Tuberculosis

(C) Malaria                                    (D) Dysentery

34. Which of the following disease is caused by bacteria?

(A) Dysentery   (B) AIDS            (C) Typhoid       (D) Malaria

35. Which of the following disease is caused by protozoan?

(A) Dysentery                                (B) Cholera                

(C) Food poisoning                      (D) Tuberculosis

36. In agriculture, _____ are used to increase soil fertility by fixing nitrogen.

(A) Virus            (B) Protozoan   (C) Bacteria      (D) Fungi

37. ______ promotes the formation of curd.

(A) Rhizobium                             (B) Lactobacillus

(C) Chlorella                                 (D) All

38. Which of the following microorganisms can be multi-cellular?

(A) Protozoan   (B) Virus            (C) Fungi           (D) Bacteria

39. ______ is used for commercial production of alcohol and wine.

(A) Yeast            (B) Rhizobium (C) HIV              (D) Amoeba

40. Process of conversion of sugar into alcohol is known as ______.

(A) Nitrogen fixation                   (B) Fermentation

(C) Curdling of milk                    (D) Pasteurization

Answer key:

31. (D)

32. (D)

33. (A)

34. (C)

35. (A)

36. (C)

37. (B)

38. (C)

39. (A)

40. (B)