Podcast
Questions and Answers
What type of nucleus do organisms in Kingdom Monera possess?
What type of nucleus do organisms in Kingdom Monera possess?
- No nucleus
- Eukaryotic nucleus
- Diploid nucleus
- Prokaryotic nucleus (correct)
Which of the following statements is true about the cell wall of Monera?
Which of the following statements is true about the cell wall of Monera?
- The cell wall is made of peptidoglycan. (correct)
- The cell wall is absent in all Monera.
- The cell wall contains chitin.
- The cell wall contains cellulose.
What is the typical size range of cells in Kingdom Monera?
What is the typical size range of cells in Kingdom Monera?
- 50-100 nm
- 1-5 cm
- 0.2-10.0 μm³ (correct)
- 10-20 mm
What substance is absent in the cell wall of archaebacteria?
What substance is absent in the cell wall of archaebacteria?
Which structural component is absent in cells of Kingdom Monera?
Which structural component is absent in cells of Kingdom Monera?
How is the genetic material of Kingdom Monera organized?
How is the genetic material of Kingdom Monera organized?
What is the characteristic of cytoplasm in Monera?
What is the characteristic of cytoplasm in Monera?
Which structure is considered absent in Monera?
Which structure is considered absent in Monera?
Where can Monera organisms typically thrive?
Where can Monera organisms typically thrive?
What is the term used to describe the DNA nature in cells of Kingdom Monera?
What is the term used to describe the DNA nature in cells of Kingdom Monera?
Study Notes
Kingdom Monera
- Derived from the Greek word "monos", meaning single or solitary.
Definition
- Consists of ancient, single-celled prokaryotic organisms with no true nucleus.
- Cells may be solitary or form filaments or colonies.
Distribution
- Found in all types of environments on Earth.
- Some species can thrive in extreme environments, such as high temperatures, high salinity, alkalinity, or acidity.
General Characteristics
- Cell Nature: Simple, prokaryotic, sometimes forming filaments or colonies.
- Cell Size and Volume: Extremely small, microscopic, with a volume of 0.2-10.0 μm³, and a length of 0.1-5.0 μm.
- Cell Wall: Present, composed of peptidoglycan and polysaccharides, except in Archaeobacteria, where it is protein-based, and in Mycoplasma, where it is absent.
- Cytoplasm: Colorless, jelly-like, with no nuclear membrane-bound organelles or gas vacuoles, but with a nuclear body and primitive cytoskeleton.
- Nuclear Body: No true nucleus, but a nucleoid, which is a region with no nuclear membrane.
- Genetic Material:
- A single, circular, naked DNA molecule (no histone proteins) in the cytoplasm, which serves as the genetic material.
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Description
Learn about the ancient, single-celled prokaryotic organisms of Kingdom Monera, their distribution, and general characteristics. Test your knowledge of these microorganisms that thrive in various environments.
