Types of Sugar: Monosaccharides and Disaccharides.
Monosaccharides (largely hexoses and pentoses). Further classification utilizes the number of carbon atoms and the functional carbonyl group. A monosaccharide containing an aldehyde group is therefore referred to as an aldose; those which contain a ketone group are ketoses. A three-carbon sugar is called a triose (an aldotriose or ketotriose). Sugars with four, five or six carbon atoms are.
Monosaccharides are the simplest of carbohydrates, they may contain as few as three carbons but the ones that have a key role in energy storage have six carbons. Disaccharides serve as transport molecules in plants and provide nutrition in animals; they are used by plants for transporting glucose around the plant as disaccharides are not easily metabolised, but disaccharides are usually.
The following table shows the classification of monosaccharides based on the number of their carbon atoms, their general structure, and examples for each. You may notice that for arabinose and glucose, their structures open up from a polygon-like structure to a chain. This is because biochemists usually use two types of drawings, called Fischer projections and Haworth projections, to draw.
Glucose and Carbohydrates. They vary in the number of carbon atomspresent in their structure. Table 1.1 shows the classification of monosaccharides (Fennema, 1996). Table 1.1. Read More. 892 Words 4 Pages. Carbohydrate Essay .January 1999 B io Factsheet Example glucose fructose galactose Number 39 Carbohydrates: Revision Summary Carbohydrates contain 3 elements: Carbon (C), Hydrogen.
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The most common monosaccharides (other than glyceraldehyde and dihydroxyacetone) which you need to know are shown below. The mirror image of D-Glc is L-Glc. For common sugars, the prefix D and L refer to the center of asymmetry most remote from the aldehyde or ketone. By convention, all chiral centers are related to D- glyceraldehyde, so sugar.
All monosaccharides can move across the plasma membrane. (3) All monosaccharides are soluble in water. When they are dissolved in water, they would take up the ring-form. This is the cause for their solubility in water. (4) When monosaccharides are dissolved in water, they would initiate the lowering of water potential of the solution. (5) Optional The water solutions of monosaccharides are.