Question

Shreya set up an experiment to investigate the outcome when different cell parts of a balsam plant leaf are removed. The results are recorded as shown in the table given.
Cell parts outcomes
P. The cell could not function properly
Q. Boiled leaf remained the same when iodine solution was added to it
R. The cell could not control the substances entering and existing it
S. The cell lost its regular shape

which one of the following best represents the cell parts P, Q, R and S?
A. P – Nucleus, Q – Ribosomes, R – Cell wall, S – Cytoplasm
B. P – Cytoplasm, Q – Chloroplast, R – Nucleus, S – Cell membrane
C. P – Nucleus, Q – Chloroplast, R – Cell membrane, S – Cell wall
D. P – Chloroplast, Q – Nucleus, R – Endoplasmic reticulum, S – Cell membrane

Answer 1

The proper functioning of the cell depends on all the organelles present in the cell. The nucleus contains all the important information of the cell. It controls all the activities of the cell. The chloroplast of the cell is the plastid which controls the photosynthesis in the leaves. The outer membrane of the cell is called a cell membrane.

Complete answer:
Cells are the basic unit of all living organisms. It contains many organelles in it such as nucleus, cytoplasm, ribosome, mitochondria, Golgi bodies, endoplasmic reticulum, vacuoles, etc. It is bounded by the cell membrane. The animal cell does not contain a cell wall.
-The label P is the nucleus. Nucleus is the main organelle of the cell. It is the controlling center of the cell. All the activities of the cell are controlled and regulated by the nucleus. It also contains the genetic material. The cell cannot function properly in the absence of the nucleus.
-The label Q is the chloroplast. It is the plastid present in the cell which is responsible for making food in the form of starch. To check the presence of starch in a leaf can be checked by using iodine solution. Starch turns the iodine solution to bluish black which is stored in chloroplast. The solution remains yellowish brown in the absence of the chloroplast.
-The label R is the cell membrane. Cell membrane is the outer layer of the cell which controls the entry and the exit of the molecules.
-The label S refers to the cell wall which is present in the plant cell. It maintains the shape of the cell.
The correct labeling for shreya’s experiment is as follows: P – Nucleus, Q – chloroplast, R – Cell membrane, S – Cell wall.

Hence, the correct answer is option (C).

Note: The cell membrane or plasma membrane present in the animal cell is semi permeable membrane. It only allows the entry of selective molecules through it. The animal cell contains the nucleus in the center of the cell. The DNA and RNA are present in the nucleus; it carries all the information of characters. Plant cell also contains other types of plastids.