Question

Animal cell is different from plant cell in lacking

• A. CaCO${}_3$ crystals in cytoplasm
• B. Sphaerosomes
• C. Pyrenoids and chloroplast
• D. All of the above

Answer 1

The correct option is D All of the above

Cell Inclusions are non-living substances in plant cells. They are of four categories - reserve food, excretory material, pigment and minerals. Due to their presence, a cell may become different from other surrounding cells. It is then called as an idioblast. Calcium carbonate occurs as a mass of crystals around a cellulose core to form cystolith e.g., leaf hypodermis of Banyan tree. Spherosomes are single half unit membrane covered small organelles in plants which synthesize and store fats. They develop from ER. In some plants, spherosomes have lysosomal activity. e.g., maize root tip. Chloroplasts are green plastids which take part in photosynthesis and temporary or permanent storage of starch. Pyrenoids are food storage bodies within the chloroplasts. All of the above mentioned structures are not found in an animal cell.