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Essential nutrients
These are the organic compounds present in the food that provide nourishment essential for the development and growth of our body. Nutrients not only provide us with the required energy to carry out various biological processes but are also the building blocks for repair and growth in our bodies.
Vitamins
The vitamins are organic molecules required in low concentration for the proper functioning of the body. They cannot be generated in the organism and are taken into the body through the diet. The lack of proper vitamins results in diverse deficiency disorders. They are thus called essential nutrients. The important vitamins are vitamin A, vitamin B complex, vitamin C, vitamin D, vitamin K, and vitamin E.
What does translucent spot mean with regards to lipid? Identify the control for this test.
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- What does translucent spot mean with regards to lipid? Identify the control for this test. 1. CheeseWhat does translucent spot mean with regards to lipid? Identify the control for this test. 1. Oil 2. Cheese 3. Water 4. CheeseWhich of the following statements best describe testing of lactose sample?* A. Lactose will quickly (less than 3 minutes) form a thin brick red precipitate in a Barfoed's test since it is a reducing monosaccharide. B. Lactose will give positive test using phenylhydrazine test and forms a needle shaped osazone C. Lactose when reacted with nitric acid and exposing to cold water bath will form insoluble white crystals. D. Lactose when tested using Seliwanoff's test will form a red colored complex.
- . Discuss the properties of potassium iodide solution, and how it results in the detection of starch. . Explain the meaning of each color that results in Starch Test, such as: 11.1 Yellow to brown and; 11.2 Blue to black.Give three other chemical tests that can be used to characterize lipid samples (can be general or specific lipid samples). Briefly describe the principle, reagents used, and the sign for positive test results for each test.Explain how the structure of lipids promotes a positive translucent spot test.
- Give and explain the principles of the following tests for lipids: Spot Test Acrolein Test Test for Free glycerol Test for Surface Tension Formation of Insoluble Soap Liebermann-Burchard Test Salkowski TestWill ether test positive for translucent spot test of lipids? Why or why not?The table below summarizes the results for Sudan IV test. Which solvent the lipid samples are homogeneous? PUT A CHECK Hexane Ethyl Acetate Water Methanol A B C Which solvent the lipid samples are heterogeneous? PUT A CHECK Hexane Ethyl Acetate Water Methanol A B C What is the nature of the lipid samples?* A. Polar B. Nonpolar
- 1. Identify what test is being described: Refers to the breaking of peptide bonds that connect amino acids to compose protein ? A. Hydrolysis B. Denaturation C. Heat denaturation D. Organic solvent denaturation E. Biuret test F. Hopkins – Cole Reaction G. Millon’s test H. Ninhydrin Test I. Sulfur test J. Xanthroproteic Test K. Chromatography L. Paper chromatography M. Competitive inhibition N. Noncompetitive inhibition O. Rancidity P. Hydrogenation 2. Identify what test is being described: Test that detects the free amino group in amino acids ? A. Hydrolysis B. Denaturation C. Heat denaturation D. Organic solvent denaturation E. Biuret test F. Hopkins – Cole Reaction G. Millon’s test H. Ninhydrin Test I. Sulfur test J. Xanthroproteic Test K. Chromatography L. Paper chromatography M. Competitive inhibition N. Noncompetitive inhibition O. Rancidity P. Hydrogenation 3. Identify what test is being described: A foreign substance, which is structurally similar to the substrate, competes for…1. Conclude regarding the chemical composition of the formation of film in fresh milk. 2. Why does fresh milk can form a film and sour milk cant?The reults for the macroscopic part: 0.30M glycerin – solution was translucent (could see text behind the test tube) 0.15M NaCl – solution was opaque (could not see text behind the test tube) 0.30M NaCl – solution was opaque (could not see text behind the test tube) 0.15M glucose – solution was translucent (could see text behind the test tube) 0.30M glucose – solution was opaque (could not see text behind the test tube) 0.30M Urea – solution was translucent (could see text behind the test tube) Results for microscopic part: 0.30M glycerin – no cells present 0.15M NaCl – normal sized cells 0.30M NaCl – crenated (shrunken and star-shaped) cells 0.15M glucose – no cells present 0.30M glucose – normal sized cells 0.30M Urea – no cells present Determine the osmolarity (hypoosmotic, isosmotic, or hyperosmotic) and tonicity (hypotonic, isotonic, hypertonic) of the following solutions.In which solutions did the osmolarity NOT match the tonicity? For those solutions, why did the osmolarity…