just give the answer, don\'t need explain, thank you ! )Which of the following s

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just give the answer, don't need explain, thank you !

)Which of the following statements is an important consequence of the first law of thermodynamics for a living organism? A) The energy content of an organism is constarnt B) An organism ultimately must obtain all of the necessary energy for life from its environment. C) The entropy of an organism decreases with time as the organism grows in complexity. D) Organisms grow by converting energy into organic matter 2) Which of the following statements describes a central role that ATP plays in cellular metabolism? A) Hydrolysis of ATP provides an input of free energy for exergonic reactions B) ATP provides energy coupling between exergonic and endergonic reactions C) Hydrolysis of the terminal phosphate group stores free energy that is used for cellular work. D) Its terminal phosphate bond is stronger than most covalent bonds in other biological macromolecules 3) Which of the following statements about enzyme function is true? A) Enzyme function is generally increased if the three-dimensional structure or conformation of an enzyme is altered. B) Enzyme function is independent of physical and chemical environmental factors such as pH and temperature C) Enzymes increase the rate of chemical reactions by lowering activation energy barriers. D) Enzymes increase the rate of chemical reactions by providing activation energy to the substrat 4) Which of the following conditions may be overcome by increasing the substrate concentration in an enzymatic reaction with a fixed amount of enzyme? A) the need for a coenzyme B) allosteric inhibition C) noncompetitive inhibition D) competitive inhibition 5) Zinc, an essential trace element for most organisms, is present in the active site of the enzyme carboxypeptidase. The zinc most likely functions a A) a noncompetitive inhibitor of the enzyme B) an allosteric activator of the enzyme C) a cofactor necessary for enzyme activity D) a coenzyme derived from a vitamin 6) HIV is the virus that causes AIDS. In the mid-1990s, researchers discovered an enzyme in HIV called protease. Once the enzyme's structure was known, researchers began looking for drugs that would fit into the active site and block it. If this strategy for stopping HIV infections were successful, it would be an example of what phenomenon? A) noncompetitive inhibition B) denaturation C) allosteric regulation D) competitive inhibition is a regulatory mechanism in which the end product of a metabolic pathway inhibits an enzyme that 7) catalyzes an early step in the pathway A) Allosteric inhibition B) Cooperative inhibition C) Feedback inhibition D) Metabolic inhibition 8) Which of the summary statements below describes the results of the following reaction? C6H1206 + 6 O2 6 CO2 + 6 H2O + Energy A) C6H1206 is oxidized and 02 is reduced. B) 02 is oxidized and H20 is reduced. C) CO2 is reduced and 02 is oxidized. D) 02 is reduced and C02 is oxidized. 9) Why are carbohydrates and fats frequently considered high-energy foods? A) They contain many oxygen atoms. B) They contain no nitrogen atoms C) They contain many electrons associated with hydrogen atoms D) They are strong oxidizing molecules 10) A cell has enough available ATP to meet its needs for about 30 seconds. What is likely to happen when an athlete exhausts his or her ATP supply? A) He or she has to sit down and rest. B) Catabolic processes are activated that generate more ATP C) ATP is transported into the cell from the circulatory system D) Other cells take over, and the muscle cells that have used up their ATP cease to function

Explanation / Answer

Ans. 1 B

Ans. 2 B

Ans. 3 C

Ans. 4 D

Ans. 5 C

Ans. 6 D

Ans. 7 C

Ans. 8 C

Ans 9.

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