raynold53 raynold53

26-03-2020
Biology

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10. Why does Staphylococcus aureus turn yellow on MSA?
A. the microbes have fermented lactose
B. the microbes are salt-tolerant
C. the microbes have fermented mannitol
D. the microbes are resistant to eosin and methylene blue
E. the microbes are resistant to phenol red

Respuesta :

maryamsalahuddin92 maryamsalahuddin92

26-03-2020

Answer:

C

Explanation:

Staphylococcus aureus turns mannitol salt agar (MSA) into yellow. Because it ferments mannitol and produces acid as a byproduct which changes the color of the indicator phenol red into yellow.

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