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Which statement is FALSE?



A. The cell wall of G+ is much thicker than G-
B. In Gram stain, G- are blue (purple) and G+ are pink (red)
C. G+ and NOT G- contain teichoic acid in their cell wall
D. In Gram stain, G+ are blue (purple) and G- are pink (red)

This question is part of Microbiology Questions
Asked by Jharry, Last updated: Jan 29, 2019

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3 Answers

A. Cook

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A. CookEnglish Professor, M.A, Ph.D, Kentucky
English Professor, M.A, Ph.D, Kentucky

Answered on Jan 30, 2019

The correct answer to this question is B. A Gram stain, or Gram's method, is a technique for identifying two types of bacteria created by scientist Hans Christian Gram in 1884 in Berlin. First, a violet dye is applied, and then a decolorizing agent is applied.

Finally, a red dye is applied. The cell walls of the bacteria retain either the first blue dye (G+) or they retain the red dye (G-). This technique helps scientists quickly separate bacteria into two groups to quickly learn more about their cellular compositions. G+ bacteria have a thicker outer layer than G- bacteria.

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K. Wilson

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K. WilsonMarketing Analyst, MBA, Miami
Marketing Analyst, MBA, Miami

Answered on Jan 29, 2019

The correct answer to this question is B. A Gram stain, or Gram's method, is a technique for identifying two types of bacteria created by scientist Hans Christian Gram in 1884 in Berlin. First, a violet dye is applied, and then a decolorizing agent is applied.

Finally, a red dye is applied. The cell walls of the bacteria retain either the first blue dye (G+) or they retain the red dye (G-). This technique helps scientists quickly separate bacteria into two groups to quickly learn more about their cellular compositions. G+ bacteria have a thicker outer layer than G- bacteria.

 Reply

John Smith

John Smith

Answered on Jan 11, 2017

In Gram stain, G- are blue (purple) and G+ are pink (red)
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