Oxidation of aldoses with nitric acid under proper conditions
Anonymous Quiz
20%
Uronic acid
29%
Aldonic acid
51%
Saccharic acids
🔥5😢2🙏1
Biochemistry ( وزاري )
In sugar plane - polarized light rotated to the light
*اخير كلمة right
🔥3🌚2❤1
-فد شوي وتنزل الكُم الأشياء ااي ركزت عليهاا دكااترة...
"تركزون ع هااي وتفهمون طريقة حل مسائل وهااهيه،"
"تركزون ع هااي وتفهمون طريقة حل مسائل وهااهيه،"
❤11🔥6❤🔥3
مرفق (4).pdf
577.8 KB
-الأسئلة ااي ركزت عليهاا الدكااترة بالإضافة إلى:-
-ليش كلوكوز يعتبر أهم جزيئة بل كاارب،؟
-ليش فركتوز أو كلوكوز يسمون بهل تسمية أو وضح هل تسمية،؟
"Glugopyranose..."
-الفرق بين كولي و ستيرو،
-الفرق بين ماايسل و ليبو،
-أهمية الباايو لل ببتاايد"حفظ 5 من ضمنها أول 2 مع الشرح"
-ستركجرات وتعويضااتهاا بل لِبد كُلش ركزت عليهاا أكثر من كاارب،"
-ليش يعتبر كاالوكتوز+ماانوز أبيمر لل كلوكوز،؟
-ستركجر نشااا حسب مطلبهاا يماا كاامل لو مُجزء،"
-ليش كلوكوز يعتبر أهم جزيئة بل كاارب،؟
-ليش فركتوز أو كلوكوز يسمون بهل تسمية أو وضح هل تسمية،؟
"Glugopyranose..."
-الفرق بين كولي و ستيرو،
-الفرق بين ماايسل و ليبو،
-أهمية الباايو لل ببتاايد"حفظ 5 من ضمنها أول 2 مع الشرح"
-ستركجرات وتعويضااتهاا بل لِبد كُلش ركزت عليهاا أكثر من كاارب،"
-ليش يعتبر كاالوكتوز+ماانوز أبيمر لل كلوكوز،؟
-ستركجر نشااا حسب مطلبهاا يماا كاامل لو مُجزء،"
❤🔥6💯3❤1😢1
Of the 20 standard amino acids only ______ is not optically active . The reason is that it's side chain _____
Anonymous Quiz
69%
Glycine, is the hydrogen
17%
Lysine ,contain only nitrogen
15%
Alanine ,is a simple methyl group
🔥4😢2👌2❤1
The Sulphur containing side chain of cysteine is
Anonymous Quiz
26%
Hydrophilic, highly reactive and capable of reacting with another cysteine
59%
Hydrophobic, highly reactive and capable of reacting with another cysteine
6%
Ampiphilic , highly reactive and not capable of reacting with another cysteine
9%
Ampiphilic , highly reactive and capable of reacting with another cysteine
😢4🥰2🌚2❤1
Which of the following statements about aromatic amino acids is correct?
Anonymous Quiz
58%
On a molar basis, tryptophan absorbs more ultraviolet light than tyrosine.
25%
Histidine's ring structure results in its being categorized as aromatic or basic, depending on pH.
17%
All are strongly hydrophilic
🥰2
The peptide alanylglutamylglycylalanylleucine has:
Anonymous Quiz
6%
a disulfide bridge.
59%
four peptide bonds
22%
five peptide bonds
7%
two free amino groups
7%
no free carboxyl group
🔥2😢1
Electrophoretic separation at pH 6 of a sample of polypeptide 1 (mw 100) polypeptide 2 (mw 200) and polypeptide 3 (mw 400) would result in which of the following?
(Note: the isoelectric point of each polypeptide occurs at pH 6)
A. Polypeptide 1 would move the farthest
B. Polypeptide 2 would move the farthest
C. Polypeptide 3 would move the farthest
D. None of the polypeptides would move.
(Note: the isoelectric point of each polypeptide occurs at pH 6)
A. Polypeptide 1 would move the farthest
B. Polypeptide 2 would move the farthest
C. Polypeptide 3 would move the farthest
D. None of the polypeptides would move.
A polypeptide with a net positive charge at physiologic pH (~7.4) most likely contains amino acids with R groups of what type?
Anonymous Quiz
18%
Acidic R groups
67%
Basic R groups
4%
Aromatic R groups
10%
Aliphatic R groups
🔥1🥰1
Three amino acid that are positively charged at neutral ph are
Anonymous Quiz
12%
R, E, H
78%
K, R, H
9%
H , R, C
🥰3
During the formation of the peptide bond which of the following takes place?
A. Hydrogen atom is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid
B. Hydrogen atom is lost from its carboxyl group of one amino acid and a hydrogen. atom is lost from its amino group of another amino acid
C. Hydroxyl group is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid
D. Hydroxyl group is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid
E. None of them
A. Hydrogen atom is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid
B. Hydrogen atom is lost from its carboxyl group of one amino acid and a hydrogen. atom is lost from its amino group of another amino acid
C. Hydroxyl group is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid
D. Hydroxyl group is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid
E. None of them
In a highly basic solution, pH= 13. the dominant form of glycine is: "
Anonymous Quiz
8%
NH3+-CH2-COO
14%
NH2-CH2-COOH
52%
. NH2-CH2-COO
20%
NH2-CH3 + -COO
6%
NH3+ -CH2-COOH
😢2🔥1
The chirality of an amino acid results from the fact that it's alpha carbon:*
Anonymous Quiz
71%
is bonded to four different chemical groups
14%
is in the L absolute configuration in naturally occurring proteins
6%
has no net charge
6%
is a carboxylic acid
3%
is symmetric
🔥2🥰1
🥰2
🥰2
Beneficial for skin, bone and tissue wound healing
Anonymous Quiz
14%
Proline
77%
Leucine
9%
Asparagine
🔥2🥰1