Question

A student has to focus his compound microscope to observe a prepared slide showing different stages of binary fission in Amoeba. The steps he is likely to follow are listed below in a haphazard manner:

I. Adjust the diaphragm and the mirror of the microscope so that sufficient light may enter to illuminate the slide.

II. Fix the slide on the stage carefully.

III. Adjust the microscope to high power and focus.

IV. Adjust the microscope to low power and focus.

The correct sequence of the above steps to observe the slide under the microscope is

(A) I, II, IV, III

(B) II, I, IV, III

(C) II, IV, I, III

(D) I, IV, II, III

Answer 1

Correct sequence of the above steps to observe the slide under the microscope:

II, I, IV, III.

II- Fix the slide on the stage carefully.

I- Adjust the diaphragm and the mirror of the microscope so that sufficient light may enter to illuminate the slide.

IV- Adjust the microscope to low power and focus.

III- Adjust the microscope to high power and focus.

The correct option is B.