47. Penicillin is most effective against infections caused by a) Gram positive b

Question

47. Penicillin is most effective against infections caused by a) Gram positive bacteria b) Viruses c) Fungi d) Protozoans e) Gram negative bacteria The reason that one continues to get the common cold is that: a) The causative agent does not stimulate the immune system b) The causative agent hides inside of cells c) There are many different viruses that cause this disease d) Antibodies are not made against the virus e) None of the above 48. Which disease is transmitted through the bit of a mosquito? a) Yellow fever b) Mumps c) Hepatitis type A d) Viral pneumonia e) Walking pneumonia 49. What was one of the first and most useful microscopic tests for classification bacteria that is still important today? a) Gram stain b) Flagella stains c) Simple stain d) Negative stain for capsule e) Acid fast stain 50.

Explanation / Answer

(47)

a)Gram positive bacteria

Explanation:

Penicillin inhibiting the synthesis of peptidoglycan in a Gram-positive bacteria. Gram negative bacteria have a lipopolysaccharide and protein layer around the peptidoglycan layer which prevents entry of penicillin.

(48)

C.there are many different viruses that cause this disease

The reason one continues to get cold is because it is caused by many different viruses (probably a more than 200)

(49)

A.yellow fever

Yellow fever is transmitted by the mosquito Aedes aegypti.

(50)a.gram stain

One of the earliest, methods of classifying bacteria is the use of the Gram Stain.

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