Question:
Acid Fast bacteria:
Acid Fast bacteria:
Show Hint
Acid-fast = Mycobacterium = Mycolic acid.
Updated On: May 14, 2026
- have cell wall with mycolic acid
- thrive well in acidic environment
- are fastidious bacteria
- cause acid depletion in soil
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Concept
Acid-fastness is a physical property of certain bacteria that allows them to resist decolorization by acids during staining procedures.
Step 2: Meaning
This property is associated with the unique composition of their cell walls.
Step 3: Analysis
Acid-fast bacteria, such as *Mycobacterium tuberculosis*, possess a waxy, lipid-rich cell wall containing high concentrations of mycolic acids. This waxy layer makes the cells highly impermeable to standard stains but, once stained, prevents the acid-alcohol decolorizer from removing the dye.
Step 4: Conclusion
The presence of mycolic acid is the primary structural reason for acid-fast characteristics. Final Answer: (A)
Was this answer helpful?
0
0
Top GAT B Biology Questions
- Bacillus thuringiensis CryA controls certain caterpillar pests by
- The principle driving force behind movement of water in plants is known as
Given below are two statement - one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Bacterial lipopolysaccharide (LPS) on its own does not induce memory B-cell in humans.
Reason R: LPS does not activate T-cell.
In light of the above statements, choose the most appropriate answer from the options given below:Francis & Crick proposed the scheme called Central Dogma in 1958. Which of the following processes was NOT covered in this scheme?
- Which one of the following is NOT an auxin?
View More Questions
Top GAT B Biotechnology Questions
- Major limitation of using NMR to determine protein structure is:
- The hormone that activates the enzyme adenylate cyclase is:
- Which of the following describes cyclin-dependent kinase (Cdk)?
A. Cdk is inactive in the presence of cyclin
B. Cdk is present throughout the cell cycle
C. Cdk is an enzyme that attaches phosphate groups to other proteins - Once the cell passes the G1 checkpoint and enters S phase:
- The fractional conversion from an immobilized enzyme continuous stirred tank reactor under steady state operation increases with an increase in agitation speed. This behavior can be attributed to:
View More Questions
Top GAT B Questions
- Which one of the following modifications is NOT a natural N-terminal modification of proteins?
- Bacillus thuringiensis CryA controls certain caterpillar pests by
- Respiratory pathway is considered as a ________ pathway
- Many enzymes catalyze both forward and reverse reactions. Which one of the following statement is NOT correct?
- Which law of thermodynamics states that "energy of an isolated system is constant"?
View More Questions