Discussion
Which of the following is a natural dye obtained from plant ?
Answer: B
The natural dye obtained from a plant is haematoxylin.
Haematoxylin is extracted from the heartwood of the logwood tree, Haematoxylum campechianum. Oxidised to haematein and used with a metal mordant such as aluminium, it stains nuclei blue-purple and is the 'H' of the routine H&E stain in histology.
Carmine is also a natural dye, but it comes from an animal: carminic acid from the cochineal insect, Dactylopius coccus. Acid fuchsin and aniline blue are synthetic dyes made from coal-tar chemicals.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development