The Feulgen stain is used for staining
- plasma membrane
- chromosomes
- phospholipids
mitochondria
The Correct Option is B
Solution and Explanation
The Feulgen stain is a specific histochemical staining technique used for detecting DNA in chromosomes.
Step 1: Understanding Feulgen Stain Mechanism - Feulgen staining is based on the Schiff reagent, which reacts with aldehyde groups produced after DNA hydrolysis with acid. - The resulting reaction produces a reddish-purple coloration, making chromosomes visible under a microscope. - This technique is highly specific for DNA, allowing for quantitative analysis.
Step 2: Evaluating the Options - Option (A) - Incorrect: The plasma membrane is not specifically stained by Feulgen stain. - Option (B) - Correct: Chromosomes (DNA) are selectively stained by Feulgen stain. - Option (C) - Incorrect: Phospholipids are stained using Sudan stains. - Option (D) - Incorrect: Mitochondria are typically stained with Janus Green B, not Feulgen stain.
Step 3: Conclusion Since Feulgen stain is used specifically for DNA, which is found in chromosomes, the correct answer is option (B).
Top Questions on Cytogenetics
Questions Asked in TANCET exam
- A, P, R, X, S, and Z are sitting in a row. S and Z are in the centre. A and P are at the ends. R is sitting to the left of A. Who is to the right of P?
- TANCET - 2024
- Statements and Conclusions
- In a new temperature scale say \( ^oP \), the boiling and freezing points of water at one atmosphere are \( 100^o P \) and \( 300^o P \) respectively. Correlate this scale with the Centigrade scale. The reading of \( 0^o P \) on the Centigrade scale is:
- TANCET - 2024
- Thermodynamics
- 138, 142, 146, 150, ?, 142, 138
- TANCET - 2024
- Statements and Conclusions
- Which is odd? Tortoise, Crab, Frog, Fish
- TANCET - 2024
- Statements and Conclusions
If A + B means A is the mother of B; A - B means A is the brother of B; A % B means A is the father of B, and A \(\times\) B means A is the sister of B, which of the following shows that P is the maternal uncle of Q?
- TANCET - 2024
- Statements and Conclusions