Question

Phosphorylation of glucose with the help of ATP and hexokinase produces

• A. Glucose 1 - phosphate
• B. Glucose 6 - phosphate
• C. Glucose 1,6 - biphosphate
• D. Fructose, 1,6 - biphosphate

Answer 1

Answer: (B)

Glucose 6 - phosphate

The mechanism of respiration is initiated by breaking down of glucose to pyruvic acid without the help of oxygen. The initial process occurs in the cytosol of cells which requires glucose as well as ATP molecules which provide energy for the process to start. The first step of glycolytic pathway involves the phosphorylation of glucose in the presence of ATP to form glucose-6-phosphate. The reaction is catalyzed by enzyme hexokinase which requires a divalent magnesium ion as a cofactor. ATP is converted into ADP in this reaction.

Thus, the correct answer is option B.