Question
What is called microbody? Write any four differences between 80S and 70S ribosomes.

Answer

Microbodies : Many membrane covered microscopic sacs in which different types of enzymes are found. It is found in plant and animal cells.
S.No.Symptoms70S80 S
1.Sedimentation coefficient70 S80 S
2.Molecular weight$2.7\times10^{6}$ daltons$4.5-5.00\times10^{6}$ daltons
3.Size18 nm20-22nm
4.Larger subunit
(a) Sedimentation coefficient50 S30 S
(b) Molecular weight$1.8\times10^{6}$ daltons$3.6\times10^{6}$ daltons
(c) Types of RNA23 S28 S
5.Smaller subunit
(a) Sedimentation coefficient30 S40 S
(b) Molecular weight$0.9\times10^{6}$ daltons$1.5\times1.8\times10^{6}$ daltons
(c) Types of RNA16 S18 S
(d) Proteins2130

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