The metabolic rate measures how much energy an organism expends over a unit of time. Its breakdown for the human body in terms of its functions is well documented : so much for the heart, for the brain, etc.

In West et al, 2002 I have found an estimate for the metabolic rate of a single cell. But how does this breakdown in terms of elementary functions in the cell?

E.g., how much of the energy made available from nutrients is used in the process of replicating genome, of expressing proteins, of trafficking...?