Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'pyridoxal kinase activity'?

A. Catalysis of the reaction: glycerone + phosphoenolpyruvate = glycerone phosphate + pyruvate.
B. Catalysis of the reaction: ATP + viomycin = ADP + O-phosphoviomycin.
C. Catalysis of the reaction: ATP + pyridoxal = ADP + pyridoxal 5'-phosphate.
D. Catalysis of the reaction: ATP + lombricine = ADP + N-phospholombricine.

Answer: Catalysis of the reaction: ATP + pyridoxal = ADP + pyridoxal 5'-phosphate.