4. a) The molecule below is a/n: amino acid dipeptide tripeptide (circle one) b) Would the molecule below test positive for the ninhydrin test? Why or Why not? Circle the portion of the molecule responsible. H O ܠܐܚܐ NH3 C CH3 H O NH–C CH₂SH

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
Section: Chapter Questions
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Lab #10 - Isolating Milk Protein - Post-Lab Questions
percent yield be higher or lower? Explain.
1. If you did not squeeze out all of the liquid from your casein, would your calculated
percent
Yeild would be higher
the mass
the
take
it by 100
So will
your
Of castin
the casin
each other
your
final #
1 lt
2. Why is the raw egg used as an antidote in cases of heavy metal poisoning such as
lead poisoning? Explain in your own words. They are used because
insolvable sold is formed
protein-heavy metal
precipitate, that must be removed
an
from
the stomach
before the gastric acid denatures the proteins
metal tree again.
sets the
OVEY mass of book 4444 Mvi fil-
toy # is big mo
than it should be,
heavy
3. Why does fresh milk curdle when vinegar or lemon juice is added? Explain in your
own words.
When milk is
too acidic, the negative charge on
becomes neutralized. Rather than pushing against
Starts 10 clump.
H
1
be ease
yo
4. a) The molecule below is a/n: amino acid dipeptide tripeptide (circle one)
b) Would the molecule below test positive for the ninhydrin test? Why or
Why not?
Circle the portion of the molecule responsible.
O
NH3-C-C-NH-C-C
CH3
Η Ο
85
*
CH₂SH
Transcribed Image Text:Lab #10 - Isolating Milk Protein - Post-Lab Questions percent yield be higher or lower? Explain. 1. If you did not squeeze out all of the liquid from your casein, would your calculated percent Yeild would be higher the mass the take it by 100 So will your Of castin the casin each other your final # 1 lt 2. Why is the raw egg used as an antidote in cases of heavy metal poisoning such as lead poisoning? Explain in your own words. They are used because insolvable sold is formed protein-heavy metal precipitate, that must be removed an from the stomach before the gastric acid denatures the proteins metal tree again. sets the OVEY mass of book 4444 Mvi fil- toy # is big mo than it should be, heavy 3. Why does fresh milk curdle when vinegar or lemon juice is added? Explain in your own words. When milk is too acidic, the negative charge on becomes neutralized. Rather than pushing against Starts 10 clump. H 1 be ease yo 4. a) The molecule below is a/n: amino acid dipeptide tripeptide (circle one) b) Would the molecule below test positive for the ninhydrin test? Why or Why not? Circle the portion of the molecule responsible. O NH3-C-C-NH-C-C CH3 Η Ο 85 * CH₂SH
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