40) Which of the following is a statement of the first law of thermodynamics? 40

Question

40) Which of the following is a statement of the first law of thermodynamics? 40) A) Energy cannot be created or destroyed. B) The entropy of the universe is constant C) Energy cannot be transferred or transformed D) The entropy of the universe is decreasing 41) Which of the following is an example of potential rather than kinetic energy? 41) A) water rushing over Niagara Falls B) a molecule of glucose C) the muscle contractions of a person mowing grass 42) When chemical, transport or mechanical work is done by an organism, what happens to the heat 42) generated? A) It is used to synthesize ADP B) It is used to store energy in the form of AT C) It is released to the environment 43) 43) The active site of an enzyme is the region that A) is inhibited by the presence of a coenzyme or a cofactor B) binds noncompetitive inhibitors of the enzyme. C) binds substrates for the enzyme. D) binds allosteric regulators of the enzyme 44) In animal cells, glycolysis occurs in the A) outer mitochondrial membrane nucleusial matrix C) mitochondrial matrix. D) inner mitochondrial membrane. E) cytosol 02-6002 45) 45) The complete reactions of cellular respiration in the presence of oxygen (CeH120 6 6 H20+energy) result in which of the following? A) oxidation of CoH120% and reduction of O2 B) reduction of CoH120% and oxidation of CO2 C) reduction of CO2 and oxidation of O2 D) oxidation of O2 and reduction of H20 46) 46) Starting with one molecule of glucose, A) 2 FADH2, 2 pyruvate, and 4 AT C) 6 CO2. 2 pyruvate, and 30 ATP B)2 NADH, 2 pyruvate, and 2 ATP. D) 6 CO2, 2 pyruvate, and 2 ATP 47) The primary role of oxygen in cellular respiration is to 47) A) serve as an acceptor for electrons and hydrogen, forming water. B) serve as an acceptor for released carbon, forming Co2 C) combine with acetyl CoA, forming pyruvate D) donate high energy electrons to the electron transport chain.

Explanation / Answer

40) according to 1st law of thermodynamics energy cannot be created nor be destroyed but it can transfer from one form to other

41) a molecule of glucose is comes under potential energy

42) It is lost to the environment.

43) it binds the substrates for the enzyme activity

44) glycolysis occurs in the cytosol of the cell up to pyruvic acid production

45)oxidation of c6h12o6 and reduction of O2 will takes place in the whole reaction

46) one molecule of glucose on glycolysis will produce 2 pyruvates, 2 NADH2 and 2 ATP molecules

47) oxygen will acts as an acceptor of electron and hydrogen by forming water

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