Which of the following cell organelles lacks $DNA$ and a bounding membrane?

Ribosomes of bacteria, mitochondria, prokaryotes, and chloroplasts are of which type (in $S$ type)?

Many ribosomes may associate with a single $mRNA$ to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as

Which cell organelle is involved in the synthesis of proteins?

Ribosomes are the site for which process?

$A$ polysome is a chain of .......