Question

'Mycoplasma' belongs to which kingdom?
1. Monera
2. Protista
3. Fungi
4. Plantae

Answer 1

Correct Answer - Option 1 : Monera

Concept-

• The five-kingdom system proposed by R.H. Whittaker.
• The kingdom defined by him was named- Monera, Protista, Fungi, Plantae, Animalia.
• The main criteria for classification used by him-
  • (1) Cell structure (2) Body organization (3) Mode of nutrition (4) Reproduction (5) Phylogenetic relationships.
• The kingdom defined by him was named-
  • Monera- All the prokarytotes.
  • Protista- All the Unicellular eukaryotes.
  • Fungi- True fungi.
  • Plantae- All the multicellular plants.
  • Animalia- All the multicellular animals.

Explanation-

Mycoplasma belongs to Kingdom Monera.

• The kingdom monera, which lacks a cell wall around their cell membranes.
• Mycoplasmas are the smallest prokaryotic organisms that can grow in the cell-free culture medium.
• They are found in man, animals, plants, insects, soil, and sewage.
• They are cell wall-less hence, they exhibit pleomorphism and thus called Joker of the plant kingdom.
• Mycoplasma is the unicellular, smallest prokaryotic organisms.

MONERA	Prokaryotic, unicellular organisms. No cell nucleus nor any other membrane-bound organelles within their cells.
PROTISTA	Green, golden, red, and brown unicellular algae large, single eukaryotic cell. The nucleus is enclosed by a membrane.
FUNGI	Multicellular, with a cell wall, organelles including a nucleus, but no chloroplasts. They have no mechanisms for locomotion.
PLANTAE	Multicellular form with specialized eukaryotic cells. Do not have their own means of locomotion.
ANIMALIA	Multicellular form with specialized eukaryotic cells. They have their own means of locomotion.