Question

Each functioning ribosome is composed of two subunits; the smaller subunit of a ribosome has a binding site for ______, and the larger subunit has two binding sites for two ______ molecules.

Answer 1

Each functioning ribosome is composed of two subunits; the smaller subunit of a ribosome has a binding site for mRNA, and the larger subunit has two binding sites for two tRNA molecules.

Explanation:

Each functioning ribosome is composed of two subunits that work together to synthesise proteins. The smaller subunit contains a binding site for the mRNA strand, ensuring it is positioned correctly to be read. The larger subunit features specific sites (the P and A sites) that hold two tRNA molecules at a time. This arrangement allows the ribosome to bring the amino acids carried by the tRNAs close enough together to form a peptide bond, effectively building a protein chain.