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Question
how would you distinguish the biomolecules from other molecules. what is the criterion for classifying a biomolecule as macromolecule or micromolecule?

Answer
A biomolecule, precisely, is a molecule produced by the metabolism of a living organism. This is in contrast to a molecule produced by a natural reaction without the assistance of enzymes or specific conditions controlled by the organism in which the reaction is taking place. A macromolecule is essentially a very large molecule; these molecules are often created by polymerization processes. There are four cardinal marcomolecular biomolecules: lipids, nucleic acids, carbohydrates, and proteins. These are all large molecules (> ~1000 atoms) that use polymerization to form. Micromolecules, in contrast, are generally monomer units of small size; micromolecules frequently polymerize to form macromolecules.

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John Locke

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I will answer all biology-related questions through the undergraduate level. I will explain unclear concepts and suggest approaches to solving problems, but would prefer not to completely solve homework problems for you. If you are completely stumped on homework, tell me what you already know and I will help you as much as possible. Please do not ask me for ideas on school research projects; part of research is determining a suitable area of investigation, and that's not a task that should be completed by someone else. Please don't simply send me your homework for solutions. If you are having difficulty after you have started an analysis, I will be happy to direct your thinking; in particular, I would prefer to not simply solve pedigrees for students, but I will be happy to assist in solving pedigrees that you have already started. If you don't understand how to analyze a pedigree, I'd highly recommend watching this video, in which a biology professor explains the basic concepts of pedigree analysis: http://www.youtube.com/watch?v=HbIHjsn5cHo

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I have a BS in Bioengineering with a concentration in Chemical Engineering (which included a heavy focus on biology), and have taught biology, biochemistry, and related subjects for some time now.

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BS Bioengineering, Penn State University MCAT/DAT/OAT Instructor

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