1x104. Student 1 claimed that the virus caused the bacteria to to become resistant, while student 2 thought that the resistant bacteria were already there. The students plate E coli on Petri dishes, wait for colonies to grow to roughly 105, then they pipette virus on to the bacterial plate. a. If student 1 is correct- what would they see on their various plates? b. If student 2 is correct - what would they see on their various plates? C. Which one of these is more likely to happen (considering what we know from Luria and Delbruck)?
1x104. Student 1 claimed that the virus caused the bacteria to to become resistant, while student 2 thought that the resistant bacteria were already there. The students plate E coli on Petri dishes, wait for colonies to grow to roughly 105, then they pipette virus on to the bacterial plate. a. If student 1 is correct- what would they see on their various plates? b. If student 2 is correct - what would they see on their various plates? C. Which one of these is more likely to happen (considering what we know from Luria and Delbruck)?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:2. In genetics lab, 2 students infected a sample of bacteria with a virus
(bacteriophage). Most E coli cells die but they noticed that some bacteria survived. The survival rate was
1x104. Student 1 claimed that the virus caused the bacteria to to become resistant, while student 2 thought
that the resistant bacteria were already there. The students plate E coli on Petri dishes, wait for colonies to
grow to roughly 105, then they pipette virus on to the bacterial plate.
a. If student 1 is correct - what would they see on their various plates?
b. If student 2 is correct - what would they see on their various plates?
C. Which one of these is more likely to happen (considering what we know from Luria and Delbruck)?
Expert Solution
Introduction
Virus or bacteriophage infection in E. coli will initially result in death of the bacterial cells. With subsequent infections the bacteria will either
1. Become resistant to the infection by some changes at its genome level.
2. Or some population of cells will survive the infection and pass the resistance to the future progeny cells.
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