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
C.
lower the activation energy of the reaction
The efficiency of enzyme catalysis is due to its capacity to lower the activation energy of the reaction. Enzymes are bio-catalysts which increase the rate of reaction without being consumed in the reaction. In case of equilibrium reactions, catalyst help in attaining the equilibrium quickly without disturbing the equilibrium.
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
Which one of the following forms the constituent of cell wall of plant cells?
Starch
Glycogen
Cellulose
Amylose
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
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
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
