This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: membrane structure and function, Subject name: Biochemistry
[{'content': 'Which of the following is a Ketose? \nSelect and explain. \nA. Glucose, B. Erythrose, C. Fructose, D. Ribose', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Monosaccharides are those sugars that cannot be hydrolyzed into simpler carbohydrates. They may be classified as trioses, tetroses, pentoses, hexoses, or heptoses, depending upon the number of carbon atoms (3-7), and as aldoses or ketoses, depending on whether they have an aldehyde or ketone groupClassification of Impoant SugarsAldosesKetosesTrioses (C3H6O3)Glycerose(glyceraldehyde)DihydroxyacetoneTetroses (C4H8O4)ErythroseErythrulosePentoses (C5H10O5)RiboseRibuloseHexoses (C6H12O6)GlucoseFructoseHeptoses (C7H14O7) -------SedoheptuloseRef: Harpers Biochemistry; 30th edition; Chapter 15; Carbohydrates of Physiological Significance', 'role': 'assistant'}]