Module 2 exam portage learning microbio 171 BIOD 2024/2025

Module 2 exam portage learning microbio 171 BIOD 2024/2025 True or false: metabolism is a controlled set of biochemical reactions that occur in living organisms in order to maintain life. - CORRECT ANS-True True or false: enzymes slow down chemical reactions to conserve energy - CORRECT ANS-false, they speed up (catalyze) chemical reactions The term for metal ions that assist enzymes during the catalysis reaction - CORRECT ANS-cofactors What is catabolism? - CORRECT ANS-The process of breaking down larger molecules into useful energy sources Upon cellular injury, which metabolic process is involved during the growth and repair phases of the cell. - CORRECT ANS-anabolism An organism that obtains its energy (derives ATP) from photons of light is called a __________________ - CORRECT ANS-phototrophic microorganism An organism that derives its energy by removing electrons from elemental sulfur would be classified as a ____________ - CORRECT ANS-Lithotroph Describe the energy transfer process relative to both ADP and ATP - CORRECT ANS-ATP has the energy (phosphate group) to donate, and ADP can accept energy in the form of a phosphate group. Thus, ATP can be dephosphorylated (ATP----- ADP + Pi), while ADP can be dephosphorylated into ATP (ADP + Pi ----- ATP) This phosphorylation process occurs in the mitochondria of chemotropic eukaryotes - CORRECT ANS-oxidative phosphorylation The catabolism of a single molecule of glucose goes through what three transitions - CORRECT ANS-The breakdown of glucose goes through 1. glycolysis 2. fermentation or respiration and then 3. electron transport chain ETC True or false: in the absence of absence of oxygen fermentation produces 2 ATP - CORRECT ANS-false what is the primary byproduct of the TCA cycle select - CORRECT ANS-NADH and FADH2 True or false: in the absence of oxygen fermentation produces 2 ATP - CORRECT ANS-False, it does not produce any additional ATP True or false: the reactants of the TCA cycle directly enter and fuel the electron transport system - CORRECT ANS-False