COENZYMES
Q. 1
Which vitamin is necessary for coenzyme A synthesis
| A | Pantothenic acid | |
| B | Ascorbic acid | |
| C | Biotin | |
| D | Pyridoxine |
Q. 1
Which vitamin is necessary for coenzyme A synthesis
| A | Pantothenic acid | |
| B | Ascorbic acid | |
| C | Biotin | |
| D | Pyridoxine |
Explanation:
A i.e. Pantothenic acid
Q. 2
Panthothenic acid is coenzyme of which of the following reaction (s):
| A | Dehydrogenation | |
| B | Oxidation | |
| C | Decarboxylation | |
| D | Acetylation |
Q. 2
Panthothenic acid is coenzyme of which of the following reaction (s):
| A | Dehydrogenation | |
| B | Oxidation | |
| C | Decarboxylation | |
| D | Acetylation |
Explanation:
D i.e. Acetylation
Pantothenic acid is necessary for synthesis of coenzyme A (CoA)Q, which functions as a coenzyme for acetylation reactionsQ
Q. 3
Coenzymes are…………..organic compounds :-
| A | Lipoprotein | |
| B | Proteinaceous | |
| C | Non-protein | |
| D | Any of the above |
Q. 3
Coenzymes are…………..organic compounds :-
| A | Lipoprotein | |
| B | Proteinaceous | |
| C | Non-protein | |
| D | Any of the above |
Q. 4
Coenzyme, in an enzymatic reaction usually functions to :
| A | Activate the substrate | |
| B | Increase the active sites of apoenzyme | |
| C | Enhance the specificity of aponzyme | |
| D | Accept one of the cleavage products |
Q. 4
Coenzyme, in an enzymatic reaction usually functions to :
| A | Activate the substrate | |
| B | Increase the active sites of apoenzyme | |
| C | Enhance the specificity of aponzyme | |
| D | Accept one of the cleavage products |
Q. 5
Coenzyme in carboxylation reactions:
| A | Pyridoxine | |
| B | Thiamine | |
| C | Biotin | |
| D | Cyanocobalamin |
Q. 5
Coenzyme in carboxylation reactions:
| A | Pyridoxine | |
| B | Thiamine | |
| C | Biotin | |
| D | Cyanocobalamin |
Explanation:
Biotin/ Vitamin H/ Coenzyme R
- It is a water-soluble B-vitamin (vitamin B7).
- It is composed of a ureido (tetrahydroimidizalone) ring fused with a tetrahydrothiophene ring.
- A valeric acid substituent is attached to one of the carbon atoms of the tetrahydrothiophene ring.
- Biotin is a coenzyme for carboxylase enzymes, involved in the synthesis of fatty acids, isoleucine, and valine, and in gluconeogenesis.
Q. 6
Coenzyme A is formed from which vitamin?
| A | C | |
| B | B4 | |
| C | Nicotinic acid | |
| D | Pentothenic acid |
Q. 6
Coenzyme A is formed from which vitamin?
| A | C | |
| B | B4 | |
| C | Nicotinic acid | |
| D | Pentothenic acid |
Q. 7
PLP is the coenzyme form of which vitamin?
| A | B1 | |
| B | B3 | |
| C | B6 | |
| D | B12 |
Q. 7
PLP is the coenzyme form of which vitamin?
| A | B1 | |
| B | B3 | |
| C | B6 | |
| D | B12 |
Q. 8
Coenzyme not required in formation of glutamate-
| A | Thiamine pyrophosphate | |
| B | Pyridoxial phosphate | |
| C | Niacin | |
| D | None of the above |
Q. 8
Coenzyme not required in formation of glutamate-
| A | Thiamine pyrophosphate | |
| B | Pyridoxial phosphate | |
| C | Niacin | |
| D | None of the above |
Explanation:
During transamination reaction glutamate is formed. Pyridoxial Phosphate acts as coenzyme.
