객관식
Which of these is considered a special stain that correctly matches its description?
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9. Microscopes
Other Types of Staining
2:58분문제 20
교과서 질문
Acid-fast bacteria contain ___________________ in their cell wall.
검증된 단계별 안내1
Understand that acid-fast bacteria are a group of bacteria characterized by their unique cell wall composition, which allows them to retain certain stains even after being washed with acid-alcohol.
Recall that the key component responsible for this acid-fast property is a type of lipid found in their cell wall.
Identify that this lipid is called mycolic acid, a long-chain fatty acid that makes the cell wall waxy and hydrophobic.
Recognize that mycolic acid is the reason acid-fast bacteria resist decolorization by acid-alcohol during staining procedures like the Ziehl-Neelsen stain.
Conclude that acid-fast bacteria contain mycolic acid in their cell wall.
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2m주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Acid-Fast Bacteria
Acid-fast bacteria are a group of bacteria that resist decolorization by acids during staining procedures. This property is due to the unique composition of their cell walls, which makes them distinguishable from non-acid-fast bacteria in microbiological tests.
추천 영상:
02:45
Acids
Mycolic Acid
Mycolic acid is a long-chain fatty acid found in the cell walls of acid-fast bacteria. It creates a waxy, hydrophobic layer that protects the bacteria from chemical damage and dehydration, and is responsible for their acid-fast staining characteristics.
추천 영상:
02:45Acids
Cell Wall Structure in Bacteria
Bacterial cell walls provide shape and protection. In acid-fast bacteria, the cell wall contains a thick layer of mycolic acid linked to peptidoglycan, which differs from typical Gram-positive or Gram-negative bacteria and influences staining and antibiotic susceptibility.
추천 영상:
03:44Introduction to Bacterial Cell Walls
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