Question

The plant cell are more rigid than animal cell due to
A. Cell wall
B. Vacuoles
C. Plastids
D. Both A and B

Answer 1

Hint: Animal cells are usually irregular in shape and are smaller in size compared to plant cells and plant cells are mostly cuboidal or rectangular in shape. The presence of certain structures forms the main difference between plant cells and animal cells.

Complete answer: In every plant cell, the cell membrane is covered by the cell wall which is a rigid wall containing polysaccharides, cellulose, and other proteins. The cell membrane is the selectively permeable membrane whereas the cell wall allows the permeation of almost all the substances. The cytoplasm is a semi-liquid material enclosed by a cell membrane. Organelles like mitochondria, rough endoplasmic reticulum, smooth endoplasmic reticulum, ribosomes, vacuoles, and nucleus are present in the cytoplasm. They have their own membranes making a distinct difference in the content of the cytoplasm and the organelles. The nucleus, also called the controller of the cell as it has the genetic material of the cell resides on the periphery of the cytoplasm in the plant cell. The nucleus has a double membrane that protects the DNA and allows the transfer of protein across the cytoplasm and nucleus for the transcription and replication of DNA. The vacuoles are present in both animal and plant cells but the size of the vacuole in the animal cell is very small whereas in plant cells it occupies the maximum volume and acts as a storage for nutrients and maintains the turgor pressure. The plastids are present only in the plant cells and are responsible for photosynthesis and pigmentation.
Hence, the correct answer is option (A).

Note: Plasmodesmata is another structure that is absent in animal cells and present in plant cells that helps in the transport of molecules across the plant cell whereas centrioles are present in animal cells but absent in plant cells.