Animal cell wall is essentially made of :
Protein
Carbohydrate
Lipid bilayer
Cellulose
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC CAPF – 2014
Animal cells do not have a cell wall. However, if the question is interpreted as referring to the main structural component of the animal cell boundary (the cell membrane), then it is the lipid bilayer.
Biologically, animal cells fundamentally *lack* a cell wall. Cell walls are found in plant cells (cellulose), fungal cells (chitin), bacterial cells (peptidoglycan), etc., providing structural support outside the cell membrane. Animal cells only have a cell membrane as their outer boundary. The cell membrane is primarily composed of a lipid bilayer with embedded proteins and associated carbohydrates. Given the options, “Lipid bilayer” is the most accurate description of the essential structural component of the animal cell *membrane*. The question is likely flawed in its phrasing, using “cell wall” instead of “cell membrane”, or is designed to test the knowledge that animal cells lack a cell wall, with the options representing components of structures *found in other organisms* or other parts of the animal cell. Assuming the most probable intent of the test setter asking about the main structural component at the cell periphery among the options, Lipid bilayer (the core of the cell membrane) is the closest fit, although technically it’s the membrane, not a wall.