Classification of Plant Kingdom

1.	Which of the following crop is helpful in nitrogen fixation?
	A. rice
	B. wheat
	C. Pod
	D. corn Option”C” is correct

2.	What is the function of leghemoglobin in nitrogen fixation?
	A. absorption of oxygen
	B. nutrition of bacteria
	C. keep the roots red
	D. absorption of light Option”A” is correct

3.	Which of the following diseases is caused by bacteria?
	A. tuberculosis
	B. Jaundice
	C. chicken pox
	D. mumps Option”A” is correct

4.	Which is the free living bacterium that increases the yield of paddy in the soil?
	A. Rhizobium
	B. azotobacter
	C. acetobacter
	D. Annabina Option”D” is correct

5.	Refrigeration helps in food preservation –
	A. by killing bacteria
	B. reduce the rate of biochemical reactions
	C. destroy enzyme action
	D. covering food with a layer of ice Option”B” is correct

6.	Which of the following microorganism is used in curd setting?
	A. acetobacter
	B. leuconostoc
	C. Bacillus
	D. lactobacillus Option”D” is correct

7.	By which of the following milk is sour?
	A. protozoa
	B. bacteria
	C. virus
	D. nematode Option”B” is correct

8.	The reason for setting of milk in the form of curd is –
	A. mycobacterium
	B. Staphylococcus
	C. lactobacillus
	D. yeast Option”C” is correct

9.	Which of the following is a symbiotic nitrogen fixing bacterium?
	A. Rhizobium
	B. azotobacter
	C. Xandhomonas
	D. pseudomonas Option”A” is correct

10.	Who discovered the virus first?
	A. stockmann
	B. Ivanovsky
	C. Stanley
	D. smith Option”B” is correct

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