تم الحل ✓
categoryالكيمياء
schoolبكالوريوس
event_available2026-07-15
السؤال
Transcribed Image Text:
9. Like blood and other body fluids, saliva can be collected at a crime scene and used for DNA analysis during a forensic investiga
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.up
Compare the three substances in terms of their starch and disaccharide content.
Starch and Disaccharide Tests for Various Substances
Solution turned a
Substance
Test
Results
x
Starch test
dark blue
Disaccharide test
No change in color
Conclusions
Y
Starch test
Disaccharide test
Solution turned
blue, but not as dark
as substance X
Solution changed
from blue to yellow
and then red
Z
Starch test
No change in color
DHOW
Disaccharide test
No change in color
11. Class project:
2
In this laboratory exercise, you examined the effect of pH on amylase activity. Temperature is another factor can inace
effectiveness of an enzyme. Design an experiment that tests the effect of temperature on amylase activity. Your experimental d
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
adow
Conduct the experiment that you designed and write a discussion that interprets and critically analyzes the data that you
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