What Is the Cause for Cloudy Centers Appearing in Lambda

question 24

Multiple Choice

What is the cause for cloudy centers appearing in lambda plaques on an Escherichia coli confluent plate?

• A) A low multiplicity of infection prevents the appearance of large numbers of lysed cells.
• B) Cell debris forms a physical barrier between uninfected cells and virions.
• C) Compounds in agar or nutrient medium protect bacterial cells from infection.
• D) A large number of infected cells become resistant to bacteriophage infection.
• E) Some infected cells become lysogens and start growing up where the infection began.

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