Question Detail

BIO 102 Viruses, Bacteria, and Fungi Objective Question
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Question

Gram-negative bacteria stain pink/red during Gram staining primarily because of which structural characteristic?
Options
A High amounts of mycolic acid in the inner leaflet
B A thick peptidoglycan layer without an outer membrane
C The absence of a plasma membrane
D A thin peptidoglycan layer with an outer lipopolysaccharide membrane
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

Gram-negative bacteria possess a thin peptidoglycan layer that allows the crystal violet-iodine complex to be decolorized, taking up the safranin counterstain.

Hint

No hint available

Question Info

Course: BIO 102
Topic: Viruses, Bacteria, and Fungi
Type: Objective
Difficulty: Not specified
Question 815 of 860
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