intro to energy

Question 1

metabolism = ___ + ___

Answer 1

catabolic reactions + anabolic reactions

Question 2

distinguish between kinetic and potential energy

Answer 2

kinetic: movement energy
potential: how much energy that could be (position)

Question 3

first law of thermodynamics

Answer 3

conservation of energy, the amount of energy in the universe can niether be created or destroyed

Question 4

second law of thermodynamics

Answer 4

every energy transformation involves an increase in entropy

Question 5

processes undergoing increases v. decreases of entropy

Answer 5

catabolic reactions: increase in entropy

anabolic reactions: decrease in entropy

Question 6

difference between exergonic and endergonic chemical reactions

Answer 6

exergonic: - delta G, spontaneous, releases energy
endergonic: +delta G, non-spontaneous, requires energy

Question 7

define free energy

Answer 7

energy available to do work (delta G)

Question 8

explain the concept of coupling reactions

Answer 8

spontaneous reactions power/drive non-spontaneous reactions

ex: catabolic reactions release energy –> feeds into anabolic reactions that require energy