BIOL 112 Chapter Notes - Chapter Unit 2 - Midterm 2 content: Start Codon, Microrna, Protein Structure

• School: UBC
• Department: Biology
• Course: BIOL 112
• Professor: Karen Smith

Document Summary

The turning on of a gene is called gene expression. The molecular processes that control whether gene expression occurs at a given time or in a given cell constitute gene regulation: dna transmits genetic information from one generation to the next. A dna strand consists of subunits called nucleotides. iconic double helix of dna shape of the twisting strands relies on the structure of. It is these negative charges that make dna a mild acid. Cellular dna molecules take the form of a double helix: the outside contours of the twisted strands form an uneven pair of grooves, called the major groove and the minor groove. The reason for this ability is that these proteins are evolutionarily conserved, which means that they are very similar in sequence from one organism to the next. Single-stranded rna molecules often form complex three-dimensional structures by folding back upon themselves, which enhances their stability.