BIOD 171 Essential Microbiology Portage Learning

Due No due date Points 5 Questions 20 Time Limit None Attempt History Attempt Time Score * Some questions not yet graded This attempt took 30 minutes. 10/11/22, 3:47 PM 2/12 Question 4 0 / 0 pts Question 3 Not yet graded / 0 pts What is the difference between catabolism and anabolism? Your Answer: Catabolism is the process of breaking down larger molecules into useful energy sources. Anabolism is the build up of macromolecules from smaller molecular units into larger complexes. Catabolism is the process of breaking down larger molecules into useful energy sources whereas anabolism is the building up or biosynthesis of macromolecules from smaller molecular units into larger complexes, most often associated with cellular growth and repair. The primary function of enzymes is to speed up chemical reactions. Enzymes are not consumed during the reaction and can be used again by the cell. Enzymes can additionally be regulated by a cofactor when a proper cofactor isn't present. When presence enzymes are active, enzymes are inactive. Enzymes speed up chemical reactions. Most notably, the enzyme is not consumed during the reaction and can be used repeatedly by the cell. Enzymes can also be regulated by a cofactor such that in the absence of the proper cofactor, enzymes are inactive while in its presence enzymes are active. 10/11/22, 3:47 PM 3/12 Chemotrophs, which acquire energy from preformed chemicals found in the environment, can be divided into either organotrophs (removing electrons from organic molecules such as glucose) or lithotrophs, which remove electrons from inorganic molecules. Your Answer: Chemotrophs can be divided int organotrophs or lithotrophs. Chemotrophs can be subdivided into what two additional subgroups? Question 5 Not yet graded / 0 pts Chemotrophs utilize which form of phosphorylation? Your Answer: Question 6 Not yet graded / 0 pts ATP has the energy to donate , while ADP has the capacity to accept energy. Answer 1: Correctt! Donate Answer 2: Correctt! Accept 10/11/22, 3:47 PM 4/12 Question 8 Not yet graded / 0 pts Question 7 Not yet graded / 0 pts What are the three distinct stages in the catabolism of glucose? Your Answer: 1. Glycolysis is the first step in the process and yields two molecules of ATP. 2. Fermentation or respiration occurs where two molecules of ATP can be produced. 3. The electron transport chain produces 34 ATP through a oxidative phosphorylation in the plasma membrane. Glycolysis is the first step of this process and yields 2 molecules of ATP. Next, by either fermentation (or respiration) 2 additional molecules of ATP can be produced. Last, the electron transport chain (ETC) produces 34 ATP via an oxidative phosphorylation event at the plasma membrane. Chemotrophs utilize oxidative phosphorylation, which uses energy released by the chemical oxidation of nutrients to reform ATP. Chemotrophs use oxidative phosphorylation (may also accept substrate level phosphorylation). Oxidative phosphorylation utilizes the energy released by the chemical oxidation of nutrients to reform ATP. 10/11/22, 3:47 PM 5/12 What are the two main strategies for replenishing cellular concentrations of NAD+, and when these strategies be utilized? Your Answer: The two main strategies for replenishing cellular concentrations of NAD+ are fermentation and respiration. Fermentation occurs in the absence of oxygen and respiration occurs in the presence of oxygen and is more efficient than the former