Depends on the cell.
Human cells, for instance, get their sugars from the blood, which got it from your digestive system whenever you ate that Big Mac in shame. Most multi-cellular creatures (Creatures with more than one cell) work this way to get cells the sugars and other stuff it needs to live. In single-celled rebellular organisms, nutrients are absorbed from the environment, floating in the water or within the dirt that cute little cell happens to be living in.
Generally all aerobic cells contain sugar to respire
glucose
sugar
Sugar and oxygen
by the sun's sunlight called calorific
by the sun's sunlight called calorific
Cells store Extra Sugar as Larger Carbohydrates
Depends on how you consume the sugar. Usually through blood cells, but sometimes the sugar enters straight to your cells. There is no definite answer.
Cells store Extra Sugar as Larger Carbohydrates
If you stop taking insulin, your body will not be able to transport glucose(sugar) into your cells. Glucose is the chief energy source for all the body's cells. Your blood sugar level will increase, and your cells will essentially begin to starve for lack of an energy source.
Cells have multiple sources of nutrients including fats and sugars, that can be used to create energy. As far as sugar is concerned, glucose is the sugar that is used by cells to produce energy.
Living cells contain sugar that they use for fuel. This sugar contains glucose which is the primary molecule that is converted to produce ATP.