Which of these organic molecules functions to speed up biological chemical reactions?
a)
lipids
b)
proteins
c)
nucleic acids
eliminate
d)
carbohydrates

B)
proteins

Proteins are biological macromolecule and mostly composed of enzymes. In biochemical reactions, it is mostly triggered by enzymes. Enzymes are important components in the process that involves metabolism and digestive functions, further, most of these enzymes are proteins. Proteins play a role in the physical make-up of a cell or acts as a cytoskeleton –maintains cell shape and figure. These proteins plays different roles and works with nucleic acids and other macromolecules in the cells including cell cycle, cell adhesion, immune response and cell indicators. 

Idont know but good luck; )