1aWhat class of macromolecule consumes the most energy for b

1a.What class of macromolecule consumes the most energy for biosynthesis?
   RNA
   DNA
   Protein
   Phospholipid

1b.Precursor metabolites
   result from fueling reactions (catabolism)
   comprise small ionic species such as Mg2+ and Cl–
   are necessary for biosynthesis (anabolism)
   both (A) AND (C)

1c. Heterotrophic bacteria
   couple energy harvesting with carbon metabolism
   utilize an independent source of energy harvesting from carbon metabolism
   can perform carbon dioxide (CO2) fixation
   rely on sunlight as a primary energy source

Solution

1c. heterotrophic bacteria uses organic carbon as food so your answer is option 3) utilize an indpendent source of energy harvesting from carbon metabolism

1b. precursors are small molecules resulting from catabolic reaction and those are essential to synthesis organic molecules in cell