I say it’s B. That’s because ribosomes are proteins. RNA creates protein synthesis using ribosomes. Thus, ribosomes help create proteins in our body.
The answer is C. On the ribosome, the protein synthesizes and then transports to the endoplasmic reticulum for further transport. For A, it usually occurs in the lysosome. For B, it occurs in the mitochondria. For D, it occurs in the cell nucleus.
I believe the answer is C. Explanation: The endoplasmic reticulum can be smooth or rough, and in general its function is to produce proteins so that the rest of the cell can function. The rough endoplasmic reticulum contains ribosomes, which are small round organelles whose function is to produce these proteins. Sometimes when proteins are made incorrectly, they get stuck in the endoplasmic reticulum and overload it, making it tight, in a way, and the proteins don’t go where they’re supposed to go. Then there is the smooth endoplasmic reticulum, devoid of ribosomes and producing other substances that the cell needs. So, the endoplasmic reticulum is an organelle that is really a workhorse in producing the proteins and substances that the rest of the cell needs. I hope to help you