NEET BIOLOGY

Detailed explanation-1: -When the cell needs to make a protein, mRNA is created in the nucleus. The mRNA is then sent out of the nucleus and to the ribosomes. When it is time to make the protein, the two subunits come together and combine with the mRNA. The subunits lock onto the mRNA and start the protein synthesis.

Detailed explanation-2: -The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.

Detailed explanation-3: -Ribosomes are found in plant and animal cells and are made up of protein and ribosomal RNA. They can be either free or attached. Ribosomes are located in the cytoplasm, on the surface of the endoplasmic reticulum, the mitochondria, and the chloroplasts. The job of ribosomes is to synthesize (or build) protein.

Detailed explanation-4: -Explanation : Nucleolus is a darkly pigmented portion of nucleus . It produces rRNA which moves from there to cytoplasm and join with proteins to form ribosomes. So it concludes that nucleolus is the portion of cell which forms ribosomes.

Detailed explanation-5: -Both plant and animal cells have ribosomes and peroxisomes. Even though plant cells have a cell wall, they also have a plasma membrane like animal cells.