True or false, Velocity causes changes in force

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

When the cell concentrates potassium within, against the natural tendency of matter, it is performing a.passive diffusion b.facilitated diffusion c.active transport d.pinocytosis

The earth's oceans are made up of chlorine, and trace elements. a) carbon, oxygen b) oxygen, silicon c) hydrogen, oxygen d) nitrogen, oxygen