what is the most importanat chracteristics in prokaryotic
Answers
The characteristics of prokaryotic cells are:
Membrane bound cell organelles such as Mitochondria, Golgi apparatus, Chloroplasts are absent.
A membrane bound well defined nucleus is absent.
Genetic material is circular DNA and occurs naked in the cell cytoplasm. It is attached to the cell membrane and called nucleoid.
The cell size ranges from 0.1 to 5.0 micrometre in size.
The cell wall is a rigid structure which is made up of polysaccharides.
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Answer:
(i) The absence of a membrane around the nuclear material.
(ii) The absence of clearly defined membrane-limited organelles like mitochondria, chloroplast, Golgi complex and lysosomes.
(iii) The genetic material is located on a single chromosome which consists of a circular double strand of DNA.
(iv) The basic protein-his tones, which are one of the most important constituents of chromosomes of eukaryotic cells, are absent in prokaryotic chromosomes.
(v) The absence of nucleolus and mitotic apparatus.
(vi) The cell wall is non-cellulosic, being formed of carbohydrates and amino acids.
(vii) The plasma membrane which lies below the cell wall is produced into the cytoplasm and acts as the mitochondrial membrane carrying respiratory enzymes.
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