Respuesta :
Answer:
E. All of the above statements are
Explanation:
Ribosomes are organelles found free floating in the cytoplasm or attached to endoplasmic reticulum (RER). They are the site of protein synthesis in a cell. Ribosomes initiate the translation process by binding to the mRNA molecule using their mRNA binding site. Several ribosomes called POLYSOMES are often attached to and translating the same MRNA molecule.
A ribosome contains four (4) binding sites; one for the mRNA and three (P-site, A-site and E-site) for tRNA, which are small RNA molecules that carry and add amino acid to the growing polypeptide chain during the process. In a nutshell, the ribosome via the aid of tRNA is responsible for joining amino acids together to form a polypeptide chain (future protein).
Ribosomes are complicated macro molecules composed up of nucleic acids and proteins. They are important as they perform a major role in protein assembly and transportation.
The correct answer is:
Option E. All of the above statements is true.
The explanation for the above option is:
- The ribosome is located either free or is connected to the endoplasmic reticulum(RER).
- Ribosomes assist in the translation of the information from mRNA.
- Polysomes are numerous ribosomes connected to a single mRNA molecule.
- Ribosomes have one binding position for mRNA and three binding positions for tRNA molecules.
- The three binding sites for tRNA is (A- site) amino acyl site, (P-site) peptidyl site and (E site) the exit site.
- Ribosome assembles amino acids to form a polypeptide chain. These polypeptides get transported to the cytoplasm.
Therefore all the above statements are true for ribosomes.
To learn more about ribosomes follow the given link:
https://brainly.com/question/19899938
