The ribosomes that occur exclusively in mammalian mitochondria are: (in $S$)

During protein synthesis,which organelle does each $t-RNA$ bring specific amino acids to,after picking them up from the cytoplasm?

Where does the synthesis of primary protein molecules take place?

What is a polysome composed of?

What is true about ribosomes?

Which of the following is a membrane-less organelle found in both eukaryotic and prokaryotic cells?