Question:
Bacterial ribosomes are present
Bacterial ribosomes are present
Updated On: Jun 7, 2022
- in cytoplasm
- on endoplasmic reticulum
- on nuclear membrane
- on cell wall
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The Correct Option is A
Solution and Explanation
Bacterial ribosomes are smal submicroscopic ribonucleoprotein entities having a size of 20 nm ? 14 - 15 nm and sedimentation coefficient of 70 S. They are of two type - free and fixed. Fixed ribosomes are attached to plasma membrane while free ribosomes are found in cytoplasmic matrix. As bacteria are prokaryotes, ER and nucleus are absent.
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The process of grouping living organisms into categories is called biological classification. The most modern 5-kingdom classification was put ahead by an eminent scientist R.H.Whittaker. The five-kingdom classification is based on the criteria like cell structure, mode of nutrition, body form, and reproduction. One of the most important characteristics of this system is that it follows the evolutionary sequence of living organisms. The organisms are classified into distinct taxa or levels like Kingdom, Phylum, Division, Class, Order, Family, Genus, and Species. The 5 kingdoms are as follows:
