A. on ribosomes present in cytoplasm as well as in mitochondria.
B. on ribosomes present in the nucleolus as well as in cytoplasm.
C. only on ribosomes attached to the nuclears envelope and endoplasmic reticulum.
D. only on the ribosomes present in cytosol.
Correct Answer : A.
Protein synthesis is the process by which amino acids are linearly arranged into proteins through the involvement of ribosomal RNA, transfer RNA, messenger RNA, and various enzymes. In animal cells, protein synthesis occurs on ribosomes present in cytoplasm as well as in mitochondria.