Biological molecules-inorganic ions

Question 1

What are Inorganic Ions?

Answer 1

 Salts/Minerals

 Inorganic = do not contain carbon, Ion = charged (+ve/-ve)

Question 2

Hydrogen ions and pH

Answer 2

pH is calculated based on concentration of H+ ions. more H+= lower pH

Question 3

Iron ions and haemoglobin

Answer 3

Haemoglobin has 4 polypeptide chains each with Fe 2+.

Fe 2+ binds to oxygen

Question 4

Sodium ions and the co-transport of glucose and amino acids

Answer 4

Sodium ions help co-transport glucose and amino acids across membranes

Question 5

Phosphate ion and ATP/DNA

Answer 5

DNA,RNA & ATP contain phosphate groups

They join nucleotides and store energy in ATP