Like blood and other body fluids, saliva can be collected at a crime scene and u

Question

Like blood and other body fluids, saliva can be collected at a crime scene and used for DNA analysis during a forensic investigation. DNA is found in cells but saliva is an acellular fluid. What do you think is the origin of the DNA found in saliva 10. Starch and disaccharide tests were completed for three substances X. Y, and Z. The test results are shown in the following table. Compare the three substances in terms of their starch and disaccharide content. Starch and Disaccharide Tests for Various Substances Substance Conclusions Test Starch test Disaccharide test Results Solution turned a dark blue No change in color Solution turned blue, but not as dark as substance X Starch test Disaccharide test Solution changed from blue to yellow and then red Starch test No change in color Disaccharide test No change in color 1. Class project: In this laboratory exercise, you examined the effect of pH on amylase activity. Temperature is another factor that can influence t effectiveness of an enzyme. Design an experiment that tests the effect of temperature on amylase activity. Your experimental des should include the following components: An introduction and rationale for the experiment .A list of materials that will be used .A description of positive and negative control tests A description of methods for testing the effect of temperature on amylase activity Tables for recording data

Explanation / Answer

9. Apart from mucus and water,saliva also contains some buccal cells (cheek cells) that are flaked off and gets mixed with saliva. These cells are the source of DNA found in saliva.

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