3.1.8 - Inorganic Ions

Question 1

inorganic ions

Answer 1

• occur in solution in the cytoplasm and body fluids of organisms
• some occur in high concentrations
• others occur in very low concentrations

Question 2

hydrogen ions

Answer 2

• determine the pH of solutions
• therefore determine enzyme function

Question 3

iron ions

Answer 3

• component of haemoglobin
• haemoglobin binds/associates with oxygen
• haemoglobin transports/loads oxygen

Question 4

sodium ions

Answer 4

• co-transport of glucose and amino acids
• sodium moved out by active transport
• creates sodium concentration gradient

Question 5

phosphate ions

Answer 5

• joins nucleotides/in phosphodiester bond/in backbone of DNA/RNA/in nucleotides
• used in/to produce ATP
• phosphorylates other compounds making them more reactive
• hydrophilic part of phospholipid bilayer/membrane