Lecture 6

Question 1

potential energy

Answer 1

stored in chemical bonds/interactions

Question 2

Energy

Answer 2

the capacity to do work

Question 3

kinetic energy

Answer 3

energy expressed as movement e.g heat/radiant energy

Question 4

bioenergetics

Answer 4

transfer of potential to kinetic energy and back in living systems

Question 5

entropy

Answer 5

measure of order

Question 6

thermodynamics

Answer 6

Reactions substrate (S) to/from product (P) will either be favourable (give out energy/exergonic) or unfavourable (need energy input/endergonic). Decides what the equilibrium state will be (at the end of the reaction how much S vs how much P)

Question 7

Energy/equilibrium

Answer 7

Weight subs for energy. If P<S, exergonic. If P>S, endergonic

Question 8

Enzymes

Answer 8

biological catalysts that lower the energy barrier and increase the reaction rate. they stabilise transition state therby lowering it. they are substrate-specific and form substrate-enzyme complexes at the activation site. ‘ase’ enzyme naming. Zones of tolerance (temp and pH), cofactors (vitamins/minerals) and may be inhibited.

Question 9

enzyme location

Answer 9

partly regulated by compartmentalisation (inside/outside cells in particular cellular compartments). Enzymes in wrong place can be sign/cause an issue