5. Inorganic Ions

Question 1

ion +ve

Answer 1

cation

Question 2

ion -ve

Answer 2

anion

Question 3

importance of Fe2+ in haemoglobin

Answer 3

haemoglobin protein that carries O2 around the body in blood cells
made up of 4 peptide chains each with Fe 2+ in centre
Fe2+ binds to O2 in haemoglobin causing Fe2+ to temporarily become Fe3+

Question 4

H+ determine PH

Answer 4

more H+ present lower PH

enzyme controlled reactions affected by PH

Question 5

Sodium ions Na+

Answer 5

molecule of glucose or amino acid can be transported into a cell along side a Na+ ion (Co transport)

Question 6

phosphate ions PO4 3-

Answer 6

when attached to another molecule known as phosphate group
DNA RNA ATP all contain phosphate groups
bonds between phosphate groups that store energy in ATP
Phosphate groups in DNA and RNA allow nucleotides to join to form polynucleotides