2.1.6 Carbohydrates (Chemical Methods) Flashcards
In copper reduction, what is the common initial reaction for it?
a. Beer’s reaction
b. Copper reaction
c. Benedict’s reaction
d. Lamberts reaction
c
Benedict’s reaction:
The 𝐂𝐮𝟐+ in copper sulfate are reduced by ________ and other
reducing agents to 𝐂𝐮+ in the presence of _______ and an/a _______
environment
Choices:
- glucose
- heat
- alkaline
Glucose
Heat
Alkaline
Copper reduction is a specific test because glucose is the only one that can catalyze the initial reaction
T or F
F
Non specific test since glucose is not the only one that causes this reaction
Ci(+) + Phosphomolybdic acid —-> Phosphomolybdenum
a. Folin-Wu
b. Nelson-Somogyi
c. Neocuproine
a
Ci(+) + arseonmolybdic acid —-> arsenomolybdenum
a. Folin-Wu
b. Nelson-Somogyi
c. Neocuproine
b
Folin-Wu and Nelson-Somogyi is a ________ reaction
a. Simple complex formation
b. Redox reaction
c. Transferases
d. Hydrolayses
b
Phosphomildbdenum and Arsenomolybdenum Produces _______ color upon reaction
a. Yellow
b. Blue
c. Green
d. Red
b
The color produced by Phosphomildbdenum, Arsenomolybdenum, and neocuproine is directly proportional to the level of Cuprous ions
T or F
T
Neocuproine is a simple complex formation between Cuprous ion and
neocuproine
T or F
T
Cuprous-neocuproine complex is yellow-orange in color
a. Blue-Green
b. Yellow-orange
c. Red-orange
d. Violet
b
Ferricyanide is reduced by _________ to ferrocyanide
Glucose
Ferricyanide (Colorless) is reduced to ferrocyanide (yellow-orange)
T or F
F
Baligtad color
Ferric Reduction is also called as Inverse colorimetry or _____________
a. Hagedorn Jensen method
b. Velvet Crow method
c. Crevanille method
d. Schiff’s method
a
Most specific, popular, and bes among all chemical methods
a. Copper reduction
b. Ferric Redcution
c. Condensation
c
Condensation is affected by oxidizing and reducing agent
T or F
F
Not affected
Glucose + o-toluidine ——> Schriff’s base (green)
a. Copper reduction
b. Ferric Redcution
c. Condensation
c
In condensation, the color is direclty proportional to the level of glucose
T or F
T
Which of this is not chemical method?
a. Copper reduction
b. Hexokinase
c. Condensation
d. Ferric reduction
b