Answer:
a. ribosome
Step-by-step explanation:
Ribosome -
The ribosome is common in both the cells of eukaryotes and prokaryotes .
Ribosomes acts as a site for protein synthesis .
Ribosomes are present even on the endoplasmic reticulum .
They link the amino acids with the messenger RNA molecules , which is used for the sequencing of the amino acid to obtain proteins .
The amino acids are carried with the help of the tRNA molecules .
hence , the correct answer for the given information is ribosome .