Multiple Choice
Prions are __________ that are thought to cause disease by __________.
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1. Introduction to Microbiology
Acellular Infectious Agents: Viruses, Viroids & Prions
Multiple Choice
Viruses can be grown in all of the following except __________.
A
embryonated eggs
B
cell-free nutrient agar
C
live animals
D
tissue culture cells
Verified step by step guidance1
Step 1: Understand that viruses require living cells to replicate because they lack the cellular machinery necessary for independent reproduction.
Step 2: Review the options given: embryonated eggs, cell-free nutrient agar, live animals, and tissue culture cells.
Step 3: Recognize that embryonated eggs, live animals, and tissue culture cells all provide living environments or living cells that support viral growth.
Step 4: Identify that cell-free nutrient agar is a non-living medium used for growing bacteria and fungi, but it does not contain living cells, so viruses cannot replicate there.
Step 5: Conclude that viruses cannot be grown on cell-free nutrient agar because it lacks the living cells necessary for viral replication.
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