Question

Metachromasia is defined as
A. Behavior of cell
B. Development of scientific attitude
C. Behavior of chromosomes at metaphase
D. Staining that gives different color from the stain that is used

Answer 1

The word metachromasia refers to the characteristic change in the shade by enhancing the contrast of sample materials that are carried out in biological tissues. The shade change observed by the dye is bound to a particular substance present in the tissues. These substances are called chromotropes.

Complete answer: The study of the behavior of the cell is called cytology. The term cytology can be divided into cytos which means cells and logy refers to its study. So, cytology simply means the study of the structure and function of plant and animal cells. Therefore, option A is wrong.
Scientific attitude refers to the confidence in procedures for seeking knowledge, open-mindedness, a desire for accurate knowledge, and the expectation that the solution of the problem will come through the use of verified knowledge. The development of a scientific attitude depends on the person perceiving it. Therefore, option B is wrong.
Metaphase is one of the events that occur during the process of mitosis. The chromosomes are spindle-shaped in the metaphase of mitosis. Therefore, option C is the wrong answer.
Metachromasia is defined as the Staining that gives a different color from the stain that is used. This process is carried out in biological tissues. One such example is toluidine blue becomes dark blue when comes in contact with the cartilage. Therefore, option D is the correct answer.

So, option D is the correct option.

Note: The mechanism of metachromasia requires polyanions present within the tissue to observe a change in the color. Acridine orange is another example of metachromatic dye. Metachromasia is a special property of biological materials.