Carbohydrate
Boat and chair conformations are found

in pyranose sugars
only in D-glucopyranose
in any sugar without axial -OH groups
in any sugar without equatorial -OH groups

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Carbohydrate
Which of the following statements about the energy needs of cells is false?

Many cellular reactions have an associated activation energy
Without a continuous input of energy, cell disorder will increase
The laws of thermodynamics force cells to acquire energy
The most usable energy for cells comes from the rapid combustion of glucose

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