57. The first law of thermodynamics is also known as the law of. A) conservation

Question

57. The first law of thermodynamics is also known as the law of. A) conservation of energy B) conservation of mass. C) conservation of entropy D) lost energy E) increased entropy 58. Entropy is often increased by: A) heat. B) order C) potential energy D) kinetic energy 59. Why does ADP have less potential energy than ATP? A) Because ATP has ribose as a sugar. B) Because ADP has only one phosphate group. C) Because ADP has only two phosphate groups D) Because ATP has adenine in it. Most of the ATP produced during cellular respiration is generated through: A) substrate-level phosphorylation. B) oxidative phosphorylation. C) reduction of NAD D) reduction of FAD. E) oxidation of pyruvate 60. 61. Animals breathe in air containing oxygen and breathe out air containing less oxygen. The consumed oxygen is used: A) in the citric acid cycle. B) in the glycolysis pathway C) in the conversion of pyruvate to acetyl Co-A. D) in photosynthesis. E) as an electron acceptor in the respiratory electron transport chain. 62. Which of these reactions summarizes the overall reactions of cellular respiration? A) C6HnQ +60;- 6??,+6H3O + energy B) 6 CO2+6 H:O+energy CaH-0s+6 O C) CsHnQ +60. + energy-> 6 ??-12H20 E) HO 2H+1/2 02 +2e

Explanation / Answer

57.A.Conservation of energy-First law of thermodynamics is known as law of conservation of energy.It states that energy can neither be created or destroyed.It can be transfered or changed from one form to another.

58.A-Heat-Heat causes molecules to vibrate more,which increases disorderliness,which inturn increases entropy of system.

59.C.Because ATP has only two phosphate groups.ATP has three phosphate groups,hence three phosphate bonds.While ADP has only two phosphate groups hence only two phosphate bonds.Hence ADP has less energy than ATP.

60.B- Oxidative phosphorylation.Oxidative phosphorylation generates maximum number of ATPs than any other process in the cell.

61.E.As electron acceptor in electron transport chain.Oxygen is the final electron acceptor in electron transport chain.It accepts electrons and get reduced.

62.A-glucose combines with oxygen to form carbon dioxide and water and releases energy in form of ATP.

63.E.matrix of mitochondria-Citric acid cycle takes place in mitochondrial matrix.

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