3. List whether each of the following substances was positive or negative for starch, as indicated by using iodine. (7 points)…
9. Use the litmus test strips to determine if the substances in containers A - C are acidic, basic, or neutral.…
3. Collect three food labels and, from the nutritional information on these labels, explain whether the foods are high, low or neither in terms of fat, sugar and salt content.…
The objective of the Reducing Sugar Test was to test if the substance has a reducing sugar in it by adding Benedict’s solution and heating it, there would be a color change if a reducing sugar is present, or it will remain blue (no reducing sugar). The objective of the Starch test was to test for starch in substances by using Iodine. The iodine will cause a substance to turn to a dark blue color if it is positive for starch. The objective for the Grease Spot Test was to test if the substance had a lipid. A positive reaction would make a translucent grease mark on a brown paper bag. The objective for the Dye test was to test for lipids. When mixed with water and the tested substance, a positive result will occur in it being separated from the water. The objective of the Protein Test was to test for proteins present in a substance using the Biuret Solution. The substance should produce a violet color within 10 drops of Biuret. The objectives of the Spit Lab were to test for starch, a reducing sugar, and effect of amylase on a cracker that is positive for starch and negative for a reducing sugar. Iodine would test if starch was present if the cracker solution changes to a dark black/blue color. Benedict’s Solution mixed with the cracker and heated would test for a reducing sugar (if reducing sugar, it will turn from a green to an orange to a dark brownish color). The amylase was tested on a Triscuit cracker by heating it in Benedict’s Solution, the amount would make it either a green, or orange, and the most amounts would make it brown as mine and my partner’s results.…
The iodine test was used to test for starch and glycogen in a particular solution. If the result turned out to be neither a blue-black or reddish-brown colour, it would be considered a negative result. If it turned blue-black, starch was…
Answer the following questions in complete sentences. Include the answers in theAnalysis and Conclusion section of your lab report.…
7. Using the charts in your notebook from Lesson 04.02 and the Protein Chart from this…
Answer Analyze and Conclude questions 1–3 on p. 241. Be sure to include your answers in your lab report.…
Complete Table 2 and answer Post Lab Questions 1 through 4 in complete sentences on the Week Three Lab Reporting Form.…
The amount of starch in the bananas can be compared by performing the iodine test and finding the intensity of dark blue colour in each sample .…
E. While performing a starch test on several different cookie brands, four tests result in the typical black color of starch presence, but the fifth gives a yellow-brown color. How might you interpret this result?…
3. List any of the food samples that tested positive for more than one type of…
3.List whether each of the following substances was positive or negative for starch, as indicated by using iodine. (7 points)…
Identify the functional groups for each of the biomolecules that react in the following biochemical tests: Benedict’s test, Iodine test, Brown Bag test, Sudan III/IV test, and the Biuret's Test.…
A. Which of the test tubes are used as the positive and negative controls? The positives are 1:glucose and 3: onion juice. The negatives are 2:Starch and :4 water.…