Choose the __ INCORRECT __ statement.
1) Primary messengers glucagon, insulin, and epinephrine cross into target cells through transporters.
2) GPCRs and RTKs are localized in the extracellular membrane.
3) Reactions from gluconeogenesis occur in the mitochondrion and the cytosol of liver cells.
4) All reactions in glycolysis occur in the cytosol.
