Inorganic Ions 1B

Question 1

What is an ion

Answer 1

An atom (or group of atoms) that have an electric charge

Question 2

What is an ion with a positive charge called

Answer 2

a cation

Question 3

What is an ion with a negative charge called

Answer 3

an anion

Question 4

What is an inorganic ion

Answer 4

An ion which does not contain carbon (with some exceptions )

Question 5

Where are inorganic ions located

Answer 5

in solution, in the cytoplasm of cells or in the bodily fluids in organisms

Question 6

How does an inorganic ions role determine its concentration

Answer 6

Each ion has a specific role. Its role determines whether it is found in high or low concentrations

Question 7

Function of iron in haemoglobin

Answer 7

Made up of four different polypeptide chains each with an iron ion (Fe2+) in the centre. It’s the Fe2+ ion that binds to the oxygen in haemoglobin
When oxygen is bound the Fe2+ ion temporarily becomes an Fe3+ ion, until oxygen is released

Question 8

Function of hydrogen ions determining PH

Answer 8

PH is calculated based on the concentration of hydrogen ions (H+) in the environment. The more H+ present the lower the PH. Enzyme controlled reactions are all affected by PH

Question 9

Function of sodium ions in transporting glucose and amino acids across membranes

Answer 9

Glucose and amino acids need a bit of help crossing cell membranes. A molecule of glucose or an amino acid can be transported into a cell alongside sodium ions (Na+). This is called co-transport

Question 10

Role of Phosphate ions in ATP and DNA

Answer 10

when a phosphate ion (PO43-) is attached to another molecule it is known as a phosphate group. DNA, RNA and ATP all contain phosphate groups. It’s the bonds between phosphate groups that store energy in ATP