a: A ribosome ~
b: A vice combined with a welding torch
What: A ribosome provides a location within a cell with the spacial orientation to facilitate the conversion of individual amino acids into peptides. The correct peptide sequence is derived from mRNA. The energy for the addition of each amino acid is contained in an activated peptide attached to a tRNA molecule. The large scale mechanical analogy of this would be a vice holding pieces of pipe together so that they can be fused together with a welding torch.
Date: Jul 20 2010 6:28 AM
# 520 Critique Analogy