Which of the following hexoses will form the same osazone when treated with excess phenyl hydrazine?
D-glucose, D-fructose and D-galactose
D-glucose, D-fructose and D-mannose
D-glucose, D-mannose and D-galactose
D-fructose, D-mannose and D-galactose
B.
D-glucose, D-fructose and D-mannose
D-glucose, D-fructose and D-mannose form the same osazone treated with excess phenyl hydrazine because they differ only 1st and 2nd carbon atoms with are transformed to the same form.
They form same osazone.
The α and β -forms of glucose are
isomers of D(+) glucose and L(-) glucose respectively
diastereoisomers of glucose
anomers of glucose
isomers which differ in the configuration of C-2
Lactose is made of
α-D-glucose only
α-D-glucose and β-D-glucose
α-D-galactose and β-D-glucose
β-D-galactose and β-D-glucose
Match the vitamin of column I with deficiency disease given in column II
| Column -I | Column - II |
| 1. Vitamin A | A. Scurvy |
| 2. Vitamin B12 | B. Hemorrhagic condition |
| 3. Vitamin C | C. Sterility |
| 4. Vitamin E | D. Xerophthalmia |
| 5. Vitamin K | E. Pernicious anaemia |
A - 3; B - 4; C - 5; D - 2; E - 1
A - 3; B - 4; C - 5; D - 1; E - 2
A - 3; B - 5; C - 4; D - 1; E - 2
A - 3; B - 5; C - 4; D - 2; E - 1
The effciency of enzyme catalysis is due to its capacity to
form a strong enzyme-substrate complex
chage the shape of the substrate
lower the activation energy of the reaction
form a colloidal solution in water
In biological systems, the RNA molecules direct the synthesis of specific proteins which are characteristic of each kind of organism. This process is known is
transcription
mutation
replication
translation
Which one of the following forms the constituent of cell wall of plant cells?
Starch
Glycogen
Cellulose
Amylose
