1.7 - Inorganic ions

Question 1

Where are inorganic ions found?

Answer 1

in solution in the cytoplasm and body fluids of organisms

Question 2

Describe the role of Na+ ions

Answer 2

• co-transport of glucose/amino acids
• affects WP of cells, therefore osmosis

Question 3

Describe the role of Fe2+/Fe3+ ions

Answer 3

component of haemoglobin in RBCs which binds with O2 molecules to transport them

Question 4

Describe the role of PO4 3- ions

Answer 4

• affects WP of cells
• joins nucleotides with phosphodiester bonds
• component of DNA
• used to produce ATP
• phosphorylates other compounds, usually making them more reactive
• hydrophilic part of phospholipid bilayer

Question 5

Describe the role of H+ ions

Answer 5

determine pH of substances e.g blood