Identify the true statement. a) proteins that are coded by different genes are all the same. b) proteins that are coded by different genes differ in shape but not function. c) proteins that are coded by different genes differ in length and the sequence of amino acids. d) proteins that are coded by different genes differ in length but contain the same sequence of amino acids.

the answer to you question is C

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.