Chloroplasts contain ......... type of riboso | vedclass

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(A) $1$. Ribosomes are the granular structures first observed under the electron microscope as dense particles by George Palade in $1953$.$2$. They ar

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$70S, 80S$

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(A) $1$. Ribosomes are the granular structures first observed under the electron microscope as dense particles by George Palade in $1953$.$2$. They are composed of ribonucleic acids $(RNA)$ and proteins and are not surrounded by any membrane.$3$. Eukaryotic ribosomes are $80S$ (where '$S$' stands for the sedimentation coefficient,Svedberg's unit),while the prokaryotic ribosomes are $70S$.$4$. Chloroplasts and mitochondria,which are semi-autonomous organelles in eukaryotic cells,contain $70S$ ribosomes,similar to prokaryotic cells.$5$. The rough endoplasmic reticulum $(RER)$ has $80S$ ribosomes attached to its surface,which are involved in protein synthesis.$6$. Therefore,chloroplasts contain $70S$ ribosomes,and the endoplasmic reticulum surface contains $80S$ ribosomes.

Chloroplasts contain ......... type of ribosomes,and the surface of the endoplasmic reticulum contains ......... type of ribosomes.

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