Use bond-line drawings to draw as many constitutional isomers as you can for C5H9OBr that contain an aldehyde functional group. How many constitutional isomers (unique compounds) can you find that contain an aldehyde?

Asuspension of yeast cells is being grown under anaerobic conditions such that glucose is degraded to ethanol and carbon dioxide. if one wishes to follow this process by monitoring the release of 14co2, at which positions in the glucose molecule would the 14c label need to be incorporated?