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Essential compounds are those that a living organism cannot build itself from other molecules, but must obtain from its environment. Your score will be determined by the number of questions you answer correctly. Sep 15, 2011 are you smarter than a 10th grade chemistry student. In living cells, enzymes act as catalysts, which may reduce the amount of activation energy required for a chemical reaction to occur. You may use this website for access to ppts, guided notes, and make up assignments. To the student reinforcement and study guide this reinforcement and study guide for biology. Chapter 2 the chemistry of life answer key mafiadoc. Living organisms need to consume organic and inorganic compounds, which they break down for energy and use as building blocks for the components of life. In biology, what is the word used to describe the appearance of an individual without regard to its hereditary constitution. Mar 18, 2019 basic general knowledge of chemistry pdf.
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