AP BIOLOGY

Detailed explanation-1: -The proteins and nucleic acids that form the ribosome sub-units are made in the nucleolus and exported through nuclear pores into the cytoplasm.

Detailed explanation-2: -A ribosome is the cellular machinery responsible for making proteins. There are many ribosomes in each cell, each made up of two subunits. These two subunits lock around the messenger RNA and then travel along the length of the messenger RNA molecule reading each three-letter codon.

Detailed explanation-3: -An area inside the nucleus of a cell that is made up of RNA and proteins and is where ribosomes are made. Ribosomes help link amino acids together to form proteins. The nucleolus is a cell organelle.

Detailed explanation-4: -Each ribosomal subunit has three binding sites for tRNA: designated the A (aminoacyl) site, which accepts the incoming aminoacylated tRNA; P (peptidyl) site, which holds the tRNA with the nascent peptide chain; and E (exit) site, which holds the deacylated tRNA before it leaves the ribosome.

Detailed explanation-5: -Ribosomes is the site for protein synthesis. The synthesis of proteins start with the binding of the ribosome on the rough endoplasmic reticulum at the translocon. A ribosome only binds to the RER once a specific protein-nucleic acid complex forms in the cytosol.