Ribosomes present in prokaryotes are:
Correct answer: D. 70S
- A. 80S
- B. 60S
- C. 50S
- D. 70S
Explanation
Prokaryotic ribosomes are characterized by a size of 70S, which is formed by the combination of a 50S large subunit and a 30S small subunit. In contrast, eukaryotic ribosomes are 80S, comprising a 60S large subunit and a 40S small subunit. Therefore, the correct answer is 70S. The options 80S and 60S are incorrect as they pertain to eukaryotic cells, while 50S is only a subunit of the prokaryotic ribosome rather than its total size.
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About Cell Structure and Function
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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