Question

Statement I: Eosinophils appear red when stained with red acidic dye.
Statement II: Eosinophils have role in allergic reactions.

• A. Both the statements are true, and statement II is the reason for statement I
• B. Both the statements are true, and statement II is the not the reason for statement I
• C. Statement I is true while statement II is false
• D. Statement I is false while statement II is true

Answer 1

The correct option is B Both the statements are true, and statement II is the not the reason for statement I

Blood is a special type of connective tissue in which blood cells are suspended in fluid called plasma. Blood cells include cells like red blood cells (RBCs), white blood cells (WBCs) and platelets.

White blood cells or leucocytes are colourless cells primarily involved in the defense mechanism of the body. WBCs can be classified as granulocytes, if they have cytoplasmic granules or as agranulocytes if they lack cytoplasmic granules.

Eosinophils are granulocytes which appear red when stained with red acidic dye like eosin. The red coloration is due to uptake of red acidic dye by these cells. Thus, statement I is true.
Eosinophils play a major role in allergic reactions. Thus, the statement II is also correct.
But their role in allergic reactions is not the reason behind the red colouration of eosinophils.