AP BIOLOGY

Detailed explanation-1: -Within the ribosome, the rRNA molecules direct the catalytic steps of protein synthesis-the stitching together of amino acids to make a protein molecule. In fact, rRNA is sometimes called a ribozyme or catalytic RNA to reflect this function.

Detailed explanation-2: -Small organelles found in our cells. They are responsible for assembling amino acids into proteins during protein synthesis.

Detailed explanation-3: -In eukaryotes, ribosome assembly is a complex process involving more than 200 assembly factors and spreads from the nucleolus to the cytoplasm. The process starts with the synthesis by the RNA Pol-I of the 35S pre-rRNA, which is co-transcriptionally bound and folded by ribosomal proteins and assembly factors.

Detailed explanation-4: -The tRNA brings these amino acids, protein’s building blocks, to the ribosome. Each tRNA molecule has two distinct ends or sites, one to bind a specific amino acid, and another to bind the corresponding mRNA codon.

Detailed explanation-5: -Definition. The nucleolus is a spherical structure found in the cell’s nucleus whose primary function is to produce and assemble the cell’s ribosomes. The nucleolus is also where ribosomal RNA genes are transcribed.