carbohydrates

Length: 3 Pages 857 Words

Carbohydrates are present in sugars, starch, acids, and in many other nutrients that consist elements of carbon, hydrogen, and oxygen. Having a ratio of 1: 2: 1 or written as CH20. A monosaccharide meaning monomer of sugar is a "simple" carbohydrate. Containing backbone of five carbon atoms that are present in ribose and deoxyribose, components of RNA and DNA. Glucose a six carbon atom that is common cellulose, starch, and glycogen are classified as polysaccharide, Known as a "complex" carbohydrate, with straight or branched chains of many sugar monomers. These categories of carbohydrates are tested in two laboratory experiments. It will allow us (my partner and I) to detect the presence of sugar or starch. The first test, using two different solutions to expose the presence of sugar or starch by color alteration. I hypothesize that both samples of the experiment will result differently in order to pursue the next test. The second test consists of 9 food items, identifying the appearance of sugar or starch. I guess in identifying 75% out of the 9 items right. Conducting both experiments will test my hypotheses either right or wrong. The first experiment on ¡°simple¡± and ¡°complex¡± carbohydrates, several too Continue...


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A different procedure was conducted to test starch. Then two drops of lugol s iodine was added. In a test tube (holding it with a test tube holder,) my partner fills 1 cm from the bottom of 10 karo syrup solution. Within the five minutes, I placed three drops of lugol s iodine on the second set (3:42 p. Both samples of the experiment resulted differently agreeing with my hypotheses. Salt is a sodium chloride, also with a pH number greater than 7. The test results indicated that certain Items were composed of carbon, containing substances that include lipids, proteins, and nucleic acids. Some of the items were organic fluids, processed powders, and flavored water, which contain either starches orand sugars. While waiting for 3 minutes, we noticed that before placing the tube in the boiling water, the benedict reagent in the 10 karo syrup was blue. After heating, we observed at 3:20 p. that the benedict solution activated and turned yellow. With the color alteration of benedict reagent and lugol s iodine, my partner and I was ready to test sugar and starch on the 9 food items. I predicted that Salt water would show starch therefore it appeared negative.

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