Question

Abhi conducted an experiment to investigate what would happen when different cell organelles of a balsam plant leaf are removed. The results are recorded in the table given.

Cell parts	Out comes
P	The cell cannot function properly.
Q	Iodine solution remains yellowish brown.
R	The cell cannot control the entry and exit of the substances.
S	The cell loses its regular shape

Identify the cell parts P, Q, R and S.

	(P)	(Q)	(R)	(S)
(A)	Nucleus	Chloroplast	Cell wall	Cytoplasm
(B)	Cytoplasm	Chloroplast	Nucleus	Cell membrane
(C)	Nucleus	Chloroplast	Cell membrane	Cell wall
(D)	Nucleus	Chloroplast	Cell wall	Cell membrane

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is C C

The label P is the nucleus- is the controlling centre of the cell. All the activities of the cell are controlled and regulated by the nucleus and the cell cannot function properly in the absence of this organelle.

The label Q is the chloroplast which is responsible for making food in the form of starch which turns the iodine solution to bluish black. In the absence of chloroplast, the solution remains yellowish brown.

The label R is the cell membrane which controls the entry and the exit of the molecules.

The label S refers to the cell wall which maintains the shape of the cell.

Thus, the correct answer is option C.