2009-10-09_-_Lecture_15

2009-10-09_-_Lecture_15 - Biochemistry 461 FS 2009 Michigan...

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Biochemistry 461 FS 2009 Michigan State University Carbohydrates - I October 9, 2009 Lecture 15 The Basics of Carbohydrates What are carbohydrates? • Carbohydrates are a class of compounds that have aldehyde or ketone groups and multiple hydroxyl groups. • Many carbohydrates have the empirical formula (CH 2 O) n . • There are 2 basic classes of carbohydrates . • Polyhydroxyl aldehydes = aldoses . • Polyhydroxyl ketones = ketoses . • Carbohydrates are also called sugars or saccharides . These terms are often used interchangeably. Starch is a type of carbohydrate. 2
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Why Care about Carbohydrates? • Photosynthesis converts 100 billion metric tons of CO 2 and H 2 O into cellulose and other plant material every year! • Carbohydrates have extensive roles in all forms of life. • They serve as energy stores and metabolic intermediates . • The sugars ribose and deoxyribose form part of the backbone of RNA and DNA . • Complex carbohydrates are structural elements found in the cell walls of bacteria and plants. • Carbohydrates are used to
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This note was uploaded on 01/17/2012 for the course NSC 461 taught by Professor Benning during the Fall '11 term at Michigan State University.

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2009-10-09_-_Lecture_15 - Biochemistry 461 FS 2009 Michigan...

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