Microorganisms MCQ Quiz - Multiple Choice Questions & Answers Page 4

31. Which one of the following is used for making breads, pastries and cakes ?

1. Yeast
2. Bacteria
3. Protozoa
4. Butter

32. Yellow vein mosaic of bhindi is a plant disease which is caused by ...................microbe ?

1. Bacteria
2. Virus
3. Fungi
4. Microbes

33. Yeast is used in the production of

1. sugar
2. alcohol
3. hydrochloric acid
4. oxygen

34. The following is an antibiotic

1. Sodium bicarbonate
2. Streptomycin
3. Alcohol
4. Yeast

35. Carrier of malaria-causing protozoan is

1. female Anopheles mosquito
2. cockroach
3. housefly
4. butterfly

36. The most common carrier of communicable diseases is

1. housefly
2. ant
3. dragonfly
4. spider

37. The bread or idli dough rises because of

1. heat
2. grinding
3. growth of yeast cells
4. kneading

38. The process of conversion of sugar into alcohol is called

1. nitrogen fixation
2. moulding
3. fermentation
4. infection