A standard pcr cycle includes three steps: denaturation (95°c), annealing (55°c), and elongation (65°c). Drag each ingredients of a pcr reaction into the bin labeled with the step in the pcr cycle in which it is first used.

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.