Question

18 multiple choice 1 point the process of diffusion requires the random movement of molecules none of the answers are correct atp transport proteins a hypotonic solution 19 multiple choice 1 point the energy of activation (ea) of a reaction is: the net change in free energy the difference in energy between the transition state and the product the difference in energy between substrate and product none of the statements are correct the energy input needed to reach the transition state

Explanation:

1. Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration, which occurs due to the random movement of molecules. It does not require ATP (as it is a passive - process), transport proteins (unlike facilitated diffusion which does), or a hypotonic solution specifically for the basic process of diffusion itself.
2. The activation energy ($E_a$) of a reaction is the energy input needed to reach the transition state. It is not the net change in free energy (which is $\Delta G$), not the difference in energy between the transition state and the product, and not the difference in energy between substrate and product.

Answer:

1. the random movement of molecules
2. the energy input needed to reach the transition state