Assembly of two subunit 40S and 60S of the Ribosomes is:
Correct answer: B. 80S unit
- A. 70S unit
- B. 80S unit
- C. 90S unit
- D. 100S unit
Explanation
The correct answer is the 80S unit, which is formed by the assembly of the 40S and 60S ribosomal subunits in eukaryotic cells. Each subunit has a specific role in protein synthesis: the 40S subunit is responsible for decoding the mRNA, while the 60S subunit facilitates peptide bond formation. Together, they create a functional ribosome essential for translating genetic information into proteins.Option A (70S unit) refers to the ribosomal structure found in prokaryotic organisms, which is not relevant to the question about eukaryotic ribosomes. Option C (90S unit) and Option D (100S unit) are incorrect as these measurements do not correspond to any known ribosomal structures. Therefore, the assembly of the 40S and 60S subunits specifically leads to the formation of the 80S ribosome, which is vital for cellular function in eukaryotes.
This question appeared on the KMU Centralized Admission Test 2021 paper, which you can sit online with every answer explained.
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About Cytoplasmic Organelles
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
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