Question:
Desmosome is the modification of
Desmosome is the modification of
Updated On: Jul 28, 2022
- Golgi bodies
- endoplasmic membrane
- plasma membrane
- ER-nucleus complex
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The Correct Option is C
Solution and Explanation
Desmosome is the modification of plasma membrane. Desmosomes come under the category of anchoring junctions, which are defined as "mechanical function, which attach cytoskeleton of one cell to the cytoskeleton of other cell or to extracellular matrix. Desmosomes are of two types-
[a] Belt desmosomes are found just below the light junction. The filaments associated with belt desmosome are $ 70\,??and contractile in nature.
[b] Spot desmosomes are the disc shaped points of contact between plasma membrane of adjacent cells.
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Concepts Used:
Prokaryotic Cells
Prokaryotic cells are single-celled microorganisms known to be the earliest on earth. Prokaryotes include Bacteria and Archaea. The photosynthetic prokaryotes include cyanobacteria that perform photosynthesis.
A prokaryotic cell contains a single membrane and therefore, all the reactions occur within the cytoplasm. They can be free-living or parasites.
Characteristics of Prokaryotic Cell:
Prokaryotic cells have different characteristic features such as:
- Lack of a nuclear membrane.
- Absence of Mitochondria, Golgi bodies, chloroplast, and lysosomes.
- Presence of genetic material on a single chromosome.
- Lack of histone proteins in the constituents of eukaryotic chromosomes.
- The cell wall is made up of carbohydrates and amino acids.
- The plasma membrane acts as the mitochondrial membrane carrying respiratory enzymes.