Question

What is the site of protein synthesis in the cell? A) Smooth endoplasmic reticulum B) Nucleus C) Nucleolus D) Ribosome E) Eukaryotic chromosome

Answer 1

The ribosome is the site of protein synthesis in the cell, and ribosomal RNA components are synthesized in the nucleolus.

Step-by-step explanation:

The site of protein synthesis in the cell is the ribosome. Ribosomes are responsible for translating the genetic code from RNA into the sequence of amino acids to form proteins. These organelles can be found both attached to the rough endoplasmic reticulum (RER) and free-floating in the cytoplasm. The RNA components of ribosomes are synthesized in the nucleolus of the nucleus. Following their synthesis in the nucleolus, ribosomal subunits are transported out to the cytoplasm where they are assembled into complete, functional ribosomes capable of synthesizing proteins.

Answer 2

The ribosome is the site of protein synthesis in the cell, and the RNA components of ribosomes are synthesized in the nucleolus.

Step-by-step explanation:

The site of protein synthesis in the cell is the ribosome. Ribosomes are the cellular structures where proteins are assembled under the direction of mRNA (messenger RNA). Protein synthesis occurs on both free ribosomes in the cytoplasm and ribosomes that are attached to the rough endoplasmic reticulum (RER). The RNA components of ribosomes, however, are synthesized in the nucleolus, which is found within the nucleus of eukaryotic cells. After assembly, ribosomes can either remain in the cytoplasm or attach to the RER where they play a crucial role in synthesizing proteins destined for specific locations in the cell or for secretion.