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PYQ 1200 Q/A Part - 1
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Kerala PSC General Science Book Study Materials Page 420
Book's First PageLipids (fats) in oats, peas, beans, apples, citrus fruits, carrots, barley and psyllium. Lipids are composed of long hydrocarbon Insoluble fiber promotes the movement chains. Lipid molecules hold a large amount of of material through your digestive system energy and are energy storage molecules. and increases stool bulk, so it can be of Lipids are generally esters of fatty acids and benefit to those who struggle with are building blocks of biological membranes. constipation or irregular stools. Whole- Most of the lipids have a polar head and non- wheat flour, wheat bran, nuts, beans and polar tail. Fatty acids can be unsaturated and vegetables, such as cauliflower, green saturated fatty acids. e.g. oils, fats, beans and potatoes, are good sources of phospholipids, glycolipids, etc. insoluble fiber. Lipids present in biological membranes are of Vitamin three classes based on the type of hydrophilic head present: A vitamin is defined as an organic compound and a vital nutrient that an Glycolipids are lipids whose head contains organism requires in limited amounts. oligosaccharides with 1-15 saccharide A compound is called a vitamin when it residues. cannot be synthesized in sufficient Phospholipids contain a positively charged quantities by an organism, and must be head which are linked to the negatively obtained from the diet. charged phosphate groups. Thus, each "vitamin" refers to a number of Sterols, whose head contain a steroid ring. vitamer compounds that all show the Example steroid. biological activity associated with a Roughage or Dietary Fiber or Bulk particular vitamin. There are two types of vitamins: fat- It includes the parts of plant foods your soluble and water-soluble. body can"t digest or absorb. Fat-soluble (Vitamins A, D, E, and K) It passes relatively intact through your vitamins are stored in your fat cells, stomach, small intestine and colon and out consequently requiring fat in order to be of your body. absorbed. Fiber is commonly classified as soluble, Water-soluble vitamins (Vitamin B & C) which dissolves in water, or insoluble, are not stored in your body; therefore, they which doesn"t dissolve. need to be replenished daily. Soluble fiber dissolves in water to form a gel-like material. It can help lower blood cholesterol and glucose levels. It is found 419