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Carbohydrate

Nutrition

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Biology
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Nutrition
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Animal nutrition
Carbohydrate
Nutrient
Food energy
Food
Fat
Protein
Trans fat
Metabolism

Nutrition Notes Foods that are high in calories in unhealthy. - False You should avoid foods with sugars in them. - False You should avoids fats in your diet. - False Vegetarian diets are low in protein. - False Main You rely on energy from food in everything you do. When your body uses the nutrients in foods, a series of chemical reactions occur inside your cells. As a result, energy is released. Metabolism is the chemical process by which your body breaks down food to release energy. A calorie in a unit of measure for the amount of energy released when nutrients are broken down. Nutrients are substances that the body needs to regulate bodily functions, promote growth, repair body tissues, and obtain energy. There are six main nutrients. Carbohydrates Fats Proteins

carbohydrates_reading_wiley

Subject: 
Chemistry
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Carbohydrates Robert J Sturgeon, Heriot-Watt University, Edinburgh, UK The carbohydrates comprise one of the major groups of naturally occurring organic molecules and are amongst the most abundant constituents of plants, animals and microorganisms. In general, carbohydrates are polyhydroxy-aldehydes or-ketones. They may contain, in addition, amino, acetamido and carboxyl functional groups. Introduction The term carbohydrate includes monosaccharides, oligo- saccharides and polysaccharides. Also included are sub- stances derived from monosaccharides such as alditols, which are derived by reduction of the carbonyl group and carboxylic acids, which are derived by oxidation of one or more terminal groups. Replacement of a hydroxyl group with a hydrogen atom produces a deoxy-sugar and

carbohydrate biofact sheet

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Starch
Disaccharide

Carbohydrates: Revision Summary B io F actsheet January 1999 Number 39 1 Carbohydrates contain 3 elements: Carbon (C), Hydrogen (H) and Oxygen (O). Thus, if we remove water from carbohydrates, all that remains is carbon. Carbohydrates can be divided into 3 categories; monosaccharides, disaccharides and polysaccharides (Table 1). Monosaccharides and Disaccharides Monosaccharides and disaccharides are sugars. They all have the basic formula (CH2O)n and can be classified according to how many carbon atoms they contain. 3C = triose sugars e.g. glyceraldehyde C3H5O2 5C = pentose sugars e.g. ribose C5H10O5 6C = hexose sugars e.g. glucose C6H12O6 Formation of disaccharides - typical exam questions Common exam questions include:

Organic Chemistry Lecture 23

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Aldonic acid

Chapter 23 ? 2010, Prentice Hall Organic Chemistry, 7th Edition L. G. Wade, Jr. Carbohydrates and Nucleic Acids Chapter 23 * Carbohydrates Synthesized by plants using sunlight to convert CO2 and H2O to glucose and O2. Polymers include starch and cellulose. Starch is a storage unit for solar energy. Most sugars have formula Cn(H2O)n, ?hydrate of carbon.? Chapter 23 Chapter 23 * Classification of Carbohydrates Monosaccharides or simple sugars: polyhydroxyaldehydes or aldoses polyhydroxyketones or ketoses Disaccharides can be hydrolyzed to two monosaccharides. Polysaccharides hydrolyze to many monosaccharide units. For example, starch and cellulose have > 1000 glucose units. Chapter 23 Chapter 23 * Monosaccharides Classified using three criteria:

Sugars

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Chemical Components of Cells - Part I: Sugars 1/14 Living organisms are chemical systems Cells contain relatively few elements The distribution of elements differs dramatically from living organisms to inanimate matter Mostly carbon, nitrogen, oxygen, and hydrogen Why do living organisms contain so much hydrogen and oxygen? Water is the most abundant molecule in the cell Atoms can interact with each other through covalent and non-covalent bonds MOLECULES ARE COVALENTLY BONDED ATOMS Result from the sharing of electrons & form the backbone of molecules Strong molecular bonds that require energy to make and break The number of electrons in the outer shell determine reactivity* Not always shared equally (i.e. Polar vs non-polar molecules)
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