Question

Subunits of 80S ribosomes are
A. 40S
B. 60S
C. 40S and 60S
D. None of the above

Answer 1

Hint: Two types of ribosomes (70 S-ribosomes and 80 S-ribosomes) were identified based on the precipitation coefficient measured in Svedberg units or S units.80'S type of ribosomes found in eukaryotic eukaryotes Size of eukaryotic ribosome (80S) is larger than prokaryotic ribosome(70S).

Complete answer: Before answering the question first of all we need to know about what is ribosome. Ribosomes are cytoplasmic non membrane bound ribonucleoprotein granules .which have a characteristic binary and narrow structure with two units of irregular size.
Prokaryotic and eukaryotic ribosomes differ in precipitation rates, 70S and 80S ribosomes, the two main types found in prokaryotes and eukaryotes, respectively. "S" (Swedish units) stands for sedimentation coefficient, which indicates how quickly organelles settle in an ultracentrifuge. The heavier the structure, the higher the settlement coefficient.
Prokaryotic 70S ribosomes are relatively small and consist of a large 50S subunit and a small 30S subunit.
80S ribosomes in eukaryotes are heavier and consist of a larger 60S subunit and a smaller 40S subunit.
So, the correct answer is “Option C”.

Additional Information:
Ribosomes are the smallest and most abundant organelles in cells. Each ribosome is porous and hydrated and consists of two irregular subunits, a large domed spheroid and a small flat spheroid. Large subunits include projections, ridges, and stems. Smaller sub-blocks have a platform, slot, head and base. This is about half the size of the larger subunit. The smaller assembly fits as a cover from one end to the larger.

Note:
The interaction of the mRNA-amino acid complex with mRNA leads to the translation of the genetic code and is regulated by ribosomes. Ribosomes with different sedimentation values ​​are found in different types of phylum for example 77S ribosomes are found in fungal mitochondria, 55S in mammalian mitochondria.