Question

Cell wall is present in
(a) Plant cell
(b) Prokaryotic cell
(c) Algal cell
(d) All of the above

Answer 1

Almost all the organisms present in the five-kingdom classification proposed by R.H.Whittaker and multicellular eukaryotic cells contain cell walls.

Complete answer:
Kingdom monera includes all prokaryotes like archaebacteria, eubacteria, mycoplasma, and actinomycetes which contain cell walls without cellulose, and in algae and kingdom Plantae, the organisms contain cell walls made up of cellulose.
The cell wall in prokaryotes is made up of polysaccharides and amino acids.

Additional information:
- In five kingdom classification the organisms are classified according to the cell structure, organization, reproduction, and phylogenetic relationships. It includes five kingdoms namely monera, protista, fungi, Plantae, and Animalia.
- All of them contains cell wall except protozoans
- In kingdom Protista of euglenoids, instead of cell wall they contain a protein-rich layer caller pellicle which makes their body flexible
- Initially heterotrophic fungi, prokaryotic monera, and unicellular eukaryotic Protists are placed under kingdom Plantae. now they are excluded from the kingdom Plantae.
- Kingdom Plantae now contain all eukaryotic multicellular chlorophyll-containing cellulose cell walls containing organisms.
- Cell wall in monera is made up of polysaccharides and amino acids. The eukaryotic cell wall in fungi is devoid of cellulose. The cell wall in Plantae is made of cellulose.
- Except in kingdom monera, the nuclear membrane is present in almost all the organisms in other kingdoms
So, the correct answer is 'all of the above'.

Note:
- Carl Linnaeus proposed a two-kingdom classification.
- R.H.Whittaker proposed five kingdom classification.
- Carl Woose proposed the six kingdom classification.
- The first classification on a scientific basis is done by Aristotle.