Question

62.

Whether a virus could cause an infection in an organism would depend on

	A.	whether the virus can gain entry into the cell.
	B.	the functioning of the host's immune system.
	C.	whether the host is the correct genus and species.
	D.	the ability of the virus to attach to the host cell.
	E.	all of the above.

64.

Which of the following is/are FALSE regarding vaccines?

	A.	Vaccines stimulate a secondary immune response.
	B.	Attenuated vaccines contain the killed microbe.
	C.	The longest-lasting immunity is achieved by administering inactivated vaccines.
	D.	Attenuated vaccines most closely imitate primary infection with the pathogen.
	E.	A, B, and C are false.

66.

Which of the following is NOT a function of antibodies?

	A.	They cause activation of complement and inflammation.
	B.	They can neutralize toxins.
	C.	They can mark cells for phagocytosis.
	D.	They target intracellular pathogens.
	E.	All of the above are functions of antibodies.

69.

The most probable number test utilizes a liquid differential media.

True

False

74.

Which of the following statements is  TRUE of the normal microbiota?

		The organisms are important for development of the immune system.
		The organisms do not normally cause disease, but are capable of causing disease.
		The term represents organisms found normally on the surfaces of the human body.
		Only A and C are true.
		All of the above are true.

75.

identification of bacteria in the laboratory usually begins with the _______ for placement in one of two large groups of bacteria.

	A.	Ehrlich's stain.
	B.	Gram stain.
	C.	Petri stain.
	D.	Koch's stain
	E.	negative stain.

81.

NAD⁺ is the oxidized form of the coenzyme.

True

False

Answer 1

62. Whether a virus could cause an infection in an organism would depend on many factors such as whether the virus particles are able to infect the host cells only after gaining entry and invading the system. Astrong immune response can affect the life cyle and growth of the virus particle so it is preferable if the host immune response is weak and the target calls are vulnerable.

Thus, the correct option is E. all of the above.

64. The option B. Attenuated vaccines contain the killed microbes is FALSE since the attenuated vaccines contain the live strains of the micro-organisms which are weaker in strength with a reduced infectious ability or virulence.

66. Antibodies are produced as a part of immune response of the body and are involved in all of the following resposes:

They cause activation of complement and inflammation, neutralize toxins, can mark cells for phagocytosis and target intracellular pathogens.

Hence the correect option is E.All of the above are functions of antibodies.

69. The most probable number test utilizes a liquid differential media which is TRUE. Multiple samples of the liquid broth are prepared to perform the MPN test.

74. Normal microbiota are the organisms found normally on the surfaces of the human body and are primarily iportant for the development of the immune system. They are certainly capable of causing disease but this microflora do ot cause disease.

Hence, correct option is E. All of the above are true.

75. identification of bacteria in the laboratory usually begins with the Gram Stain for placement in one of two large groups of bacteria which is gram-positive and gram-negative respectively.

Hence, correct option is B. Gram's stain.

81.NAD+ is the oxidized form of the coenzyme. This statement is TRUE.