Microorganisms - Section 3 | Multiple Questions and Answers

21.	Negative Staining is used for examining _?

	A.	virus particles
	B.	protein molecules
	C.	bacterial flagella
	D.	virus particles, protein molecules and bacterial flagella

22.	Which among the following helps us in getting a three-dimensional picture of the specimen?

	A.	Transmission Electron Microscope
	B.	Scanning Electron Microscope
	C.	Compound Microscop
	D.	Simple Microscope

23.	The secondary electrons radiated back in scanning microscope is collected by?

	A.	specimen
	B.	anode
	C.	vacuum chamber
	D.	cathode

24.	On what factors do the intensity of secondary electrons depend upon?

	A.	shape of the irradiated object
	B.	chemical composition of the irradiated object
	C.	number of electrons ejected
	D.	size and chemical composition of the irradiated object, number of electrons ejected and on the number of electrons reabsorbed by surrounding