In Gram Staining, Crystal Violet (A Violet Dye) Is Used

question 27

Short Answer

In Gram staining, crystal violet (a violet dye) is used to specifically stain Gram-positive bacteria. After performing Gram staining on a bacterial sample taken from an infected animal tissue, you observe the results with a microscope. You find two major types of bacteria in the sample, as shown in the schematic drawing below. According to these results, indicate whether each of the following statements is correct (C) or incorrect (I). Your answer would be a three-letter string composed of letters C and I only, e.g. CCC.

( ) The Gram-positive bacteria in this sample are bacilli.
( ) Crystal violet stains lipopolysaccharide (LPS).
( ) The bacteria stained violet in this sample have a thicker layer of peptidoglycan compared to the other bacteria.

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Definitions:

Amnesty

A governmental act of pardoning a group or class of individuals from legal penalties, typically for political offenses, as part of a reconciliation process.

Bid-Rigging

A form of fraud where competing parties conspire to determine the winner of a bidding process, undermining the competitiveness of the process.

Collusive Agreement

An arrangement where businesses conspire to fix prices, limit supplies, or divide markets, often to restrict competition.

Auxiliary Mechanism

A support system or process that assists or complements the main system in achieving its objectives.