Inorganic Molecules/Ions

Question 1

Ammonium

Answer 1

NH4+

Question 2

Role of ammonium ions

Answer 2

Production of nitrate ions by bacteria

Source of nitrogen (vitamins, chlorophyll etc)

Question 3

Calcium

Answer 3

Ca2+

Question 4

Role of calcium

Answer 4

Nerve impulse transmission (synapse)
Muscle contraction
Formation of blood clots
Regulate protein channels affecting permeability

Question 5

Structural role of calcium

Answer 5

Bones/teeth/exoskeleton - development of lamellae in between plant cell wall

Question 6

Sodium

Answer 6

Na+

Question 7

Role of sodium

Answer 7

Kidney function (absorption of water)

Question 8

Role of potassium

Answer 8

Stomata opening

Question 9

Potassium

Answer 9

K+

Question 10

Role of potassium, sodium and calcium

Answer 10

Nerve impulse transmission

Question 11

Role of sodium and potassium

Answer 11

Maintains osmotic pressure (plant cells remain turgid)
Assist active transport through proteins
Sodium potassium pump in active transport of glucose in intestine
Maintains body ph of 7

Question 12

Chlorine

Answer 12

Cl-

Question 13

Role of chlorine

Answer 13

Balances positive charge of Na+ and K+ in cells

Question 14

Phosphate

Answer 14

PO43-

Question 15

Role of phosphate

Answer 15

Cell membrane formation (phospholipids)
Form nucleotides and nucleus acid
Form ATP (3 phosphate groups - release energy)
Bone formation

Question 16

Hydroxide

Answer 16

OH-

Question 17

Role of hydroxide

Answer 17

Catalyses reactions and determines pH

Question 18

Nitrate

Answer 18

NO3-

Question 19

Role of nitrate

Answer 19

Supplies nitrogen to plants for amino acids and protein formation

Question 20

Hydrogen carbonate

Answer 20

HCO3-

Question 21

Role of HCO3-

Answer 21

Maintains blood ph (7) and transports CO2 in blood

Question 22

Hydrogen

Answer 22

H+

Question 23

Role of hydrogen

Answer 23

Catalysis of reactions (respiration or photosynthesis)
pH determination (blood/cytoplasm)