Question

Which of the following is NOT true about Gram-positive bacteria?

Question 6 options:

	They stain purple after the Gram stain procedure.
	Their cell walls consist of up to 90% peptidoglycan.
	Their cell walls contain teichoic acids.
	Their cell walls include an outer membrane.

Which of the following statements describing the different types of microorganisms is FALSE?

Question 54 options:

	Fungi are eukaryotic organisms that consist of molds, mushrooms, & yeast
	Parasites live in or on another organism in a non-mutual relationship
	Bacteria are single celled organisms capable of independent metabolism
	Algae are not capable of independent metabolism

Selective toxicity can BEST be defined as…

Question 56 options:

	The ability of a drug to kill the pathogen regardless of side effects to the host cells
	The ability of a drug to kill Gram-positive but not Gram-negative bacteria
	The ability of a drug to kill pathogens but leave normal flora and non-pathogens unharmed
	The ability of a drug to target a pathogen but leave host cells relatively unharmed

Which pathogen is NOT correctly matched with its disease?

Question 62 options:

	Rhinovirus – common cold
	Hepatitis A – chronic hepatitis and cirrhosis
	Neisseria meningitides – meningitis
	Human Immunodeficiency Virus – AIDS

Which of the following would be an example of a broad spectrum antibiotic?

Question 64 options:

	An antibiotic used to treat gram-negative pathogens in the Enterobacteriaceaefamily
	An antibiotic used to treat a variety of gram-positive and gram-negative infections
	An antibiotic used to treat Mycobacterium tuberculosis infections

Answer 1

Answer for question 6 - Their cell wall include an outer membrane .

Explanation -

The Gram positive bacteria contains the thick peptidoglycan in thier cell wall and retain the purple color by staining with the crysatl violet . The gram positive bacteria contains teichoic acid and build a complex with lipoid named as lipoteichoic acids acting as a chelating agent.The gram positive bacteria doesn't contain the outer lipid membrane whereas gram negative bacteria contains thick outer lipid membrane and thin peptidoglycan in cell wall.