2.3: ATP and inorganic ions Flashcards
ATP
Immediate source of energy in a cell
In respiration energy released from glucose
is used to make ATP
ATP
stand for
Adenosine triphosphate
ATP made from
nucleotide base adenine
ribose sugar
3 phosphate groups
ATP known as a
nucleotide derivative
nucleotide derivative
modified form of a nucleotide
ATP … after its made
diffuses to the part of the cell that needs energy
Energy in ATP stored
in high energy bonds between phosphate groups
Energy released by ATP
hydrolysis reaction
ADP
adenosine diphosphate
ATP broken down into
ADP and Pi
Pi
inorganic phosphate
ATP hydrolyse
Catalyses hydrolysis reaction of ATP into ADP, breaking a phosphate bond and releasing its energy
Coupled reaction
ATP hydrolysis coupled to other energy requiring reaction so energy can be used directly and not lost as heat energy
Phosphorylation
Addition of an inorganic phosphate to a compound making the compound more reactive
ATP synthase
Catalyses condensation reaction of ADP and Pi to re-synthesise ATP occurs during photosynthesis and respiration
Inorganic ions have an
electric charge
Ion with a + charge
cation
Ion with a - charge
anion
Inorganic ion
An ion that doesn’t contain carbon
a few exceptions
Inorganic ion’s role
depends on its properties
determines whether its found in high or low concs.
Inorganic ions found in
solution, the cytoplasm of cells, body fluid of organisms
Haemoglobin
Large protein that carries oxygen around the body, in red blood cells
Whats haemoglobin made up of
4 different polypeptide chains, each with an iron ion in the centre
Which element in haemoglobin binds to the Oxygen
iron ion (Fe2+)
What happens when Fe2+ binds to oxygen in haemoglobin
it temporarily becomes Fe3+
pH, low pH
more conc H+
more acidic
lower pH
