Question

61.Chromosomes are visible in a light microscope during which of the phases 8f thE 2U cycle? a. Gl/S/ G2 All 5 phases of M c. b. d. Late Telophase only 62. The role of oxygen in aerobic respiration is Act as an electron donor during glycolysis b. a. Act as an electron acceptor during the electron transport chain It has no role in aerobic respiration d. c. It regenerates NAD from NADP 63. The four phases of aerobic cellular respiration in order are a. Glycolysis, electron transport chain, Kreb's cycle, pyruvate oxidation b. Transcription, translation, replication, ribosome c. Glycolysis, pyruvate oxidation, Kreb's cycle, electron transport chain d. Glycolysis, pyruvate oxidation, electron transport chain, Calvin Cycle 64. The digestive enzyme pepsin works in the stomach to break down proteins. Its optimal pH for functioning is 2.0. You take an antacid which works by raising the pH of your stomach to 6. What effect do you expect this will have on pepsin and its function and why? a. By raising the pH toward neutral the enzyme will denature and function better than at pH 2 and will break down protein more efficiently By raising the pH the enzyme pepsin will denature and unfold leaving it unable to function in breaking down proteins b. c. Changing the pH will not affect how pepsin functions d. The function of pepsin will decrease because the lower pH will change the protein to a carbohydrate 65Which of the following are functions of carbohydrates a energy storage, membrane make up b. information storage, electron transport, energy energy storage, structural component c. d. transport, defense, structure, catalyst match the letter with the correct structure _Androneci um orolla

Answer 1

61. During most of the cell cycle, interphase, the chromosomes are somewhat less condensed and are not visible as individual objects under the light microscope. However during cell division, mitosis, the chromosomes become highly condensed and are then visible as dark distinct bodies within the nuclei of cells.

62. b) Oxygen acts as a final electron acceptor that helps move electrons down a chain that results in adenosine triphosphate production.

63. c) Glycolysis, pyruvate oxidation, Kreb's cycle, Electron transport chain

64. b.) Pepsin is a protease that operates in the acid pH of the stomach. Many proteins are denatured at low pH.

65. might be c) and a)   short-term energy storage (source of energy for cells),  provide structure in plants, some animals, and other organisms, quick energy, energy storage, structure