Giải bài tập Ôn tập chương 5

Analysis of Exercise Solutions for Chapter 5

Microorganisms have a variety of nutritional forms, which is significant for nature as it helps them adapt, grow, and develop in different environments. This diversity allows them to thrive in various conditions, as microorganisms are present everywhere on Earth.

When making yogurt, it is essential to sterilize all utensils with boiling water because milk provides an excellent environment for microbial growth. If the utensils are not sterilized, bacteria and other pathogens will quickly multiply.

Looking at the graph in Figure 1, the growth of the E. coli bacterial population in an environment with two carbon sources, glucose, and sorbitol, can be explained. The curve illustrates the phenomenon of diauxic growth occurring when the culture medium contains two different carbon sources. Initially, the bacteria synthesize enzymes to metabolize the easier compound, glucose. Once glucose is depleted, the bacteria induce the synthesis of enzymes to metabolize the second carbon source, sorbitol. The graph displays two phases of lag, two exponential growth phases, and two equilibrium phases.