This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
The first step in fructose metabolism in the liver is 
Select and explain. 
A. Isomerization of glucose, B. Phosphorylation to fructose 1, 6 bisphosphate by ATP, C. Phosphorylation to fructose 6 phosphate by ATP, D. Phosphorylation to fructose 1 phosphate by ATP
D: Phosphorylation to fructose 1 phosphate by ATP
Answer: D: Phosphorylation to fructose 1 phosphate by ATP 
Explanation: Fructose metabolism The first step isFructose| ATP to ADP| FructokinaseFructose-1-Phosphate Second step: Fructose-1-Phosphate can conve into Glyceraldehyde or DHAP with the help of Aldolase (Fructose-1-Phosphate aldolase)Glyceraldehyde conveed to Glyceraldehyde-3-Phosphate with the help of Triose kinase and ATP conveed to ADPDHAP conveed to Glyceraldehyde-3-Phosphate with help of Triose-phosphate isomerase.