B A C
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Below is an image of 3 different bacteria, letter labeld, growing on MacConkey Agar.
Note that bacteria such as E. coli use mixed acid fermentation, with very high acid production which
will cause a colored precipitation around colonies on MacConkey agar.
MacConkey Agar
C
![Match the descriptions below to the correct letter labeled bacterium
this Bacterium/Bacteria can grow in the
[Choose ]
presence of bile salts and crystal violet and
cannot ferment lactose, "lac -"
[Choose]
Bacteria B & C
this Bacterium/Bacteria can grow in the
presence of bile salts and crystal violet and
Bacterium C
can ferment lactose, "lac +"
Bacterium A
This Bacterium is possibly _E. coli_, an
indicator of fecal contamination of food or
[ Choose ]
water
This Bacterium could be either_Salmonella_,
Shigella_ or Yersinia_ which can grow on
MacConkey agar and are lac--
1.
[Choose]
>](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe24735fd-3291-4647-b61f-a148a3463e38%2Fdaa04aab-213c-44a0-88fd-254933ded5ac%2Fxw7ls3_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Match the descriptions below to the correct letter labeled bacterium
this Bacterium/Bacteria can grow in the
[Choose ]
presence of bile salts and crystal violet and
cannot ferment lactose, "lac -"
[Choose]
Bacteria B & C
this Bacterium/Bacteria can grow in the
presence of bile salts and crystal violet and
Bacterium C
can ferment lactose, "lac +"
Bacterium A
This Bacterium is possibly _E. coli_, an
indicator of fecal contamination of food or
[ Choose ]
water
This Bacterium could be either_Salmonella_,
Shigella_ or Yersinia_ which can grow on
MacConkey agar and are lac--
1.
[Choose]
>
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