Answer to Study Guide Questions for Chapter 2 & 3

Answer to Study Guide Questions for Chapter 2 & 3 - Answer...

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Answer to Study Guide Questions for Chapter 2 & 3 For quiz and test Know definitions of matter, element, compound, & atom – Matter – anything that takes up space and has mass Element – substance that cannot be broken down to other substances by ordinary means – (92 occur naturally in nature) Compound – substance containing two or more elements in a fixed ratio – Atom – smallest unit of an element Match atoms structures and charge (electron, neutron, proton) Electron – negative Neutron – neutral – (isotopes are atoms that differ in number of neutrons) Proton – positive What is an organic molecule – a molecule that contains Carbon (C) Know different functional groups and what they make (ie. Alcohols, amines) – hint – note the *** Methyl Group CH 3 In Fatty Acid Chains , insoluble in water **Hydroxyl Group OH Hydrogen bonded to oxygen and then carbon skeleton - Alcohols – Water Soluble **Amino Group Amines NH 2 Nitrogen bonded to 2 hydrogens – picks up H+ (weak base), called amines – make up amino acids with carboxyl and amino group, **Carboxyl Group COOH Carbon double bonded to oxygen and OH- In amino acids, fatty acids , water soluble, highly polar, acts as acid (release H+) – carboxylic acids Phosphate Group PO 3 - Phosphorus bonded to four oxygen atoms – In nucleotides (ATP) plus DNA, RNA, Sulfhydryl Group SH Help stabilize the structure of proteins Carbonyl Group C=O Carbon linked by double bond to oxygen – on end = aldehyde, inside = ketone in carbohydrates Form of sugar that plants and humans store sugar – Plants store starch within plastids, including chloroplasts Humans store energy as glycogen in muscle and liver
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Hydrophobic vs hydrophilic – Hydrophobic – water “fearing” Hydrophilic – water “loving” Saturated and Unsaturated Fatty Acids Saturated – No carbon-carbon double bonds A hydrogen at every possible position Form straight chains – so stack and stick in arteries Generally solid at room temperature – animal fats
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This note was uploaded on 03/28/2008 for the course BIO 105 taught by Professor Mickle during the Fall '07 term at N.C. State.

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Answer to Study Guide Questions for Chapter 2 & 3 - Answer...

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