Inoganic Ions

Question 1

What is the use of hydrogen ions, H+ and hydroxide ions, OH-

Answer 1

• affects the acidity of solutions
• H+ used in respiration to provide energy to make ATP
• H+ used in photosynthesis to provide energy to make ATP

Question 2

What is the function of Fe2+/Fe3+

Answer 2

Structural component of haemoglobin, binding to O2 to allow the transport of oxygen to respiring tissue

Question 3

What is the function of Na+

Answer 3

Used in the co-transport of glucose and amino acids from the lumen of the small intestine, into intestinal epithelial cells. Changes the water potential of the immediate area
Also used in nervous conduction

Question 4

What is the function of the PO43- ion

Answer 4

Components of phospholipids which make the cell and organelle membranes, DNA, RNA and ATP

Question 5

What is the function of nitrites and nitrates ions- NO2- and NO3-

Answer 5

Taken up by the plant roots, used in making amino acid

Question 6

Function of chloride ions, Cl-

Answer 6

Used in regulating the water potential of the small intestine