2.1 Molecules to metabolism
IB Syllabus Statements
Understandings:
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Molecular biology explains living processes in terms of the chemical substances involved.
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Carbon atoms can form four covalent bonds allowing a diversity of stable compounds to exist.
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Life is based on carbon compounds including carbohydrates, lipids, proteins and nucleic acids.
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Metabolism is the web of all the enzyme-catalysed reactions in a cell or organism.
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Anabolism is the synthesis of complex molecules from simpler molecules including the formation of macromolecules from monomers by condensation reactions.
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Catabolism is the breakdown of complex molecules into simpler molecules including the hydrolysis of macromolecules into monomers.
Applications and skills:
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Application: Urea as an example of a compound that is produced by living organisms but can also be artificially synthesized.
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Skill: Drawing molecular diagrams of glucose, ribose, a saturated fatty acid and a generalized amino acid.
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Skill: Identification of biochemicals such as sugars, lipids or amino acids from molecular diagrams.
Videos
Intro to Molecular Biology
Condensation and Hydrolysis
Chemical Elements
Metabolism Intro
Falsifying the Vital Force
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Topic 2.1 Molecules to metabolism SSaQ (Syllabus Statement as Questions)
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Define molecular biology.
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How many bonds are formed by each of the following types of atoms: carbon, nitrogen, oxygen, hydrogen
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Name 4 major groups of carbon compounds that life is based from.
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Outline what is meant by the term metabolism.
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Compare the terms anabolism and catabolism.
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Explain how the artificial synthesis of urea helped to falsify vitalism.
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Draw the following molecular diagrams: glucose (ring form, alpha-D and beta-D), ribose (ring form/D-ribose), a saturated fatty acid, a generalized amino acid (include the R-group).
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Explain how you would use visual cues to identify the following biochemicals: sugars (monosaccharides and disaccharides), lipids (tryglycerides, phospholipids, steroids), amino acids.