inorganic ions

Question 1

ion

Answer 1

atom / group of atoms that has an electric charge

Question 2

ion w positive charge

Answer 2

cation

Question 3

ions w negative charge

Answer 3

anion

Question 4

iron ion charge

Answer 4

Fe2+

Question 5

iron ion

Answer 5

• haemoglonin is a large protein that carries oxygen around the body in the red blood cells.
• made up of four different polypeptide chains, each with an iron ion in the centre.
• Fe2+ binds to the oxygen in haemoglobin, when oxygen is bound it temporarily becomes Fe3+ until the oxygen is released.

Question 6

hydrogen ion charge

Answer 6

H+

Question 7

hydrogen ion

Answer 7

• pH is determined by the concentration of H+ ions

- the higher the concentration of H+ ions, the lower the pH and more acidic

Question 8

sodium ion charge

Answer 8

Na+

Question 9

sodium ion

Answer 9

-a molecule of glucose or amino acid can be transported into a cell across cell surface membrane alongside sodium ions, known as co-transport.

Question 10

phosphate ion charge

Answer 10

(PO4)3-

Question 11

phosphate ion

Answer 11

• when a phosphate ion is attached to another molecule, it’s known as a phosphate group
• e.g. the bonds between phosphate groups store energy in atp
• e.g. phosphate groups in dna and rna allow nucleotides to join up to form polynucleotides.