Which specific chemical can be applied to achieve staining of chromosomes?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Acetocarmine.
Acetocarmine is a specialized biological stain commonly used in cytogenetic studies to vividly color chromosomes, making them clearly visible under a microscope during cell division (mitosis or meiosis).
Acetocarmine, a solution of carmine dye in acetic acid, particularly binds to the DNA in chromosomes, highlighting their structure and enabling detailed observation of their morphology and behavior.
While chemicals like ethanol and methanol are used as fixatives to preserve cells, and hydrochloric acid may aid in tissue hydrolysis, they do not provide the targeted chromosomal staining that acetocarmine achieves.