BIOLOGY 171 BIO 171 / BIO171 MICROBIO MODULE 2 QUIZ 2

PORTAGE LEARNING BIOLOGY 171 BIO 171 / BIO171 MICROBIO MODULE 2 QUIZ 2 Question 1 2 / 2 pts True or False: As movement requires energy, metabolism can be defined as a controlled set of biochemical reactions that occur in only motile organisms in order to maintain life. True False Metabolism occurs in all living organisms, not just those that move. Question 2 0 / 2 pts True or False: Enzymes are polysaccharides that catalyze chemical reactions. True False Question 3 0 / 5 pts What are the usually metal ions known to assists enzymes during the catalysis reaction? Your Answer: Hydrolases Isomerases Ligases Lyases Oxidoreductases transferases Cofactors are usually metal ions and assist enzymes during the catalysis reaction. Question 4 5 / 5 pts Define anabolism. Your Answer: Is the constructing or biosynthesis of macromolecules from tiny molecular parts into bigger complexes; it is mostly related to celluar growth and repair. Anabolism is the process of building up or biosynthesis of macromolecules from small molecular units into much larger complexes. Question 5 5 / 5 pts In order to convert proteins into amino acids which metabolic process would be active? Your Answer: Catabolism Catabolism would be active as proteins are made up of amino acids. Therefore the process described (proteins into amino acids) is the breakdown, or catabolism of protein. Question 6 10 / 10 pts Describe the energy transfer process relative to both ATP and ADP. Your Answer: ATP donate Energy and ADP accept Energy ATP has the energy (phosphate group) to donate while ADP can accept energy in the form of a phosphate group. Thus, ATP can be reduced (ATP ⟶ ADP + Pi) while ADP can be built into ATP (ADP + Pi ⟶ ATP). Question 7 2 / 2 pts An organism that derives its energy (generates ATP) from photons of light is called a ? Your Answer: phototrophs Phototrophic microorganism Question 8 2 / 2 pts An organism that obtains its source of carbon from inorganic molecules such as carbon dioxide is referred to as a ? Your Answer: autotrophs Autotroph Question 9 2 / 2 pts A reactive intermediate would be present in which phosphorylation process? Oxidative phosphorylation Substrate-level phosphorylation The chemical compound losing the phosphate group is referred to as the phosphorylated reactive intermediate. Photophosphorylation Unanswered Question 10 0 / 5 pts The catabolism of a single molecule of glucose goes through what 3 distinct transitions? Your Answer: The breakdown of glucose goes through (1) Glycolysis then (2) Fermentation or Respiration and finally through (3) the electron transport chain (ETC). Unanswered Question 11 0 / 5 pts What is the most energetic transition in the catabolism of glucose? Your Answer: The electron transport chain yields 34 ATP while both glycolysis and fermentation (or respiration) each yield only 2 ATP. Question 12 0 / 2 pts Identify the products of the following chemical equation: Glucose + 2NAD+ → 2 NADH + 2 Pyruvate + 2 ATP Your Answer: 6 The products are to the right of the arrow: 2NADH, 2 Pyruvates and 2 ATP Question 13 0 / 2 pts The presence of what molecule ‘signals’ to the cell that glycolysis is about to start? Your Answer: glucose