PLEASE ANSWER QUESTIONS 4 AND 5 BASED OFF THE STRUCTURES SHOWN BELOW

1. Which characteristic is different when comparing the open-chain forms of D-sorbose and D-ribose? 1. the number of primary alcohol groups. 2. the number of secondary alcohol groups. 3. the number of stereogenic centers. 4. the number of carbonyl groups. 2. Which describes the relationship between D-sorbose and D-fructose? a. They are diastereomers that are also epimers. b. They are diastereomers but not epimers. c. They are epimers but not diastereomers. d. They are neither epimers nor diastereomers. 3. When comparing D-sorbose with D-glucose, 1. they have the same number of equatorial substituents. 2. they have the same number of epimers. 3. they have the same chemical formula. 4. they make the same reduced product. 4. Comparing the ring forms of D-glucose and D-sorbose, we would find 1. They are both furanoses. 2. They are both pyranonses. 3. D-glucose forms a furanose and D-sorbose forms a pyranose. 4. D-glucose forms a pyranose and D-sorbose forms a furanose. 5. None of the above are true. 5. Draw the ring forms of D-glucose and D-sorbose. (6 pts.)