Lecture 3

Lecture 3 - Lecture 3 1. Know the major elements found in...

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Lecture 3 1. Know the major elements found in biological systems and the different types of functional groups found in simple biochemicals a. Carbon, hydrogen nitrogen, oxygen (these 4 are most abundant), phosphorus, sulfur (less abundant) i. Ionic Bond 1. electrons unequally shared 2. water soluble ii. Covalent Bond 1. Most common bonds in biochemicals 2. Formed by sharing electron pairs 3. Defined number of covalent bonds for each atom iii. Hydrogen Bond 1. Partial negative charge on oxygen in H2O, resulting in H-bond 2. Stabilize many biological molecules (DNA and proteins) iv. Hydrophobic effects 1. Nonpolar molecules tend to group together to minimize contact with polar molecules v. Van der Vaals forces – a type of hydrophobic effect cause (hydrophobic tails associating together to minimize contact) b. Functional Groups i. Carbonyl Groups 1. Aldehydes and ketones 2. Forms H-bonds 3. Found in sugars ii. Hydroxyl Groups 1. Unreactive 2. Forms H-bonds
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3. Found in sugars and alcohols
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This note was uploaded on 03/25/2010 for the course MB 351 taught by Professor Keen during the Spring '08 term at N.C. State.

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Lecture 3 - Lecture 3 1. Know the major elements found in...

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