I. Genes and Gene Experession 7.1 Macromolecules and Genetic Information II. DNA STRUCTURE 7.2 DNA Structure: The Double Helix 双螺旋 7.3 DNA Structure: Supercoiling 超螺旋结构
5.7 Direct measurements of microbial growth: total and viable counts 5.8 Indirect Measurements : Turbidity 浊度 5.9 Continuous culture: the chemostat 连续培养:恒化器