NEET 2019
- Exam
- NEET
- Year
- 2019
- Subject
- Botany
- Chapter
- Respiration in Plants
NEET 2019 · Botany · Respiration in Plants
Conversion of glucose to glucose-6-phosphate, the first...
Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by:
Options
- AAldolase
- BHexokinase
- CEnolase
- DPhosphofructokinase
Correct answer
B. Hexokinase
Step-by-step solution
Hexokinase.
In the first step of glycolysis, the glucose ring is phosphorylated. Phosphorylation is the process of adding a phosphate group to a molecule derived from ATP. As a result, at this point in glycolysis, 1 molecule of ATP has been consumed.
For enzyme hexokinase, Mg++ ions are used as activator.