LIFESCI 3 Study Guide - Midterm Guide: Histone Octamer, Histone H1, Histone Fold
Document Summary
Chromosome structure (lecture 1b: slides 73-99) (bacteria & viruses were mentioned but most of the chromosome section is for. Chromatin = general term to describe the dna-protein structure of chromosomes. Chromosomes = each contains one single, large dna molecule & many proteins. Cellular dna is associated with proteins & arranged in chromosomes. Half the molecular weight of a chromosome are proteins. Functions of chromosomal arrangement of dna : (cprt) compact it. Compacts dna to fit inside cell dna sequences are huge so needs to. Protects dna from damage naked dna is susceptible to damage & is. Regulates the accessibility of dna a level of regulation for gene expression. Transmitted efficiently to daughter cells during cell division unstable so it needs to be protected by proteins. Only dna compacted in chromosome can be transmitted & tightly packed. Chromosomal makeup of different organisms: (not so important except for bacteria) Some bacteria can have linear chromosomes but most are circular.
