5.2.1 (a) Flashcards
why is energy needed in organisms?
active transport
movement
anabolic reactions
active transport
- kidney –> selective reabsorption
- root hair cells —-> mineral ions uptake
- nervous system —> generation of AP
movement
flagella and cilia require ATP to move
the cytoskeleton needs ATP for movement
MUSCLES
is photosynthesis exothermic or endothermic?
endothermic
is respiration exothermic or endothermic?
exothermic
function of ATP
it is the store of energy in organisms
how is energy stored in ATP
in the chemical energy in the phosphate bond
thus when hydrolysis of ATP occurs energy is released
what catalyses the formation of ATP?
ATP synthase
what is the process of ATP formation?
phosphorylation
what catalyses the break down of ATP?
ATPase
what is the process of ATP breaking down?
hydrolysis
what are the properties of ATP?
stores a small amount of energy
is small and soluble so can be transported around a cell
easily broken down so can release energy quickly
what processes do plants do?
photosynthesis and respiration
the products of both processes are used as reactants as well
what is the compensation point?
the light intensity at which the rate of photosynthesis is the same as the rate of respiration
how can you identify the compensation point?
when the rate of oxygen production is 0
because this means rate of oxygen usage in respiration is the same as the rate of oxygen production in photosynthesis
