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Finding the identity of unlabeled bacteria strains by defieciency growth table.

Ursa

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2 years ago

Finding the identity of unlabeled bacteria strains by defieciency growth table.

my homework question is stated as follows:

A lab technician has four strains of bacteria. Although he forgot to label them, he knows that they include one F+ strain, one Hfr strain, one F' strain, and one F- strain. He observed the following results after plating these strains on different media. Which of the following plates can be used to identify the F- strain?

I attached a screenshot of the figure provided and the correct answer, I just need some help understanding it.

To me it seems like adding histidine, glutamate, cysteine, and streptomycin would result in you finding out that the sample is F+.
I thought the answer would be to add leucine and streptomycin to the minimal growth medium, and when that was wrong I thought it would be histidine, glutamate, and cysteine.

Source Genetic Analysis: an Integrated Approach 3e
Mark F. Sanders
John L. Bowman
Chapter 6

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bio_man

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2 years ago

Found the answer here: https://biology-forums.com/index.php?topic=2000760.0

Any further questions, let me know!

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Answer accepted by topic starter

emlaai

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