3.1.8 Inorganic Ions

Question 1

(Inorganic Ions) What is an inorganic ion?

Answer 1

A molecule that DOES NOT contain carbon atoms.

Question 2

(Inorganic Ions) How are ions gained?

Answer 2

Through nutrition.

Question 3

(Inorganic Ions) Cytoplasm and body fluids maintain optium levels of each ion dependant on what?

Answer 3

The cell’s function.

Question 4

(Inorganic Ions) Each ion has a specific role dependant on what?

Answer 4

Its properties.

Question 5

(Inorganic Ions) What does an ions role determine?

Answer 5

Whether it is found in high or low concentrations.

Question 6

(Inorganic Ions) What is haemoglobin and what is its function?

Answer 6

Large protein that carries oxygen around the body in red blood cells.

Question 7

(Inorganic Ions) What is haemoglobin made up of?

Answer 7

Four different polypeptide chains, each with an iron ion in the centre.

Question 8

(Inorganic Ions) What does the iron ion in haemoglobin do?

Answer 8

Binds to the oxygen.

Question 9

(Inorganic Ions) What happens when oxygen is bound to the Fe2+ ion?

Answer 9

Temporarily becomes an Fe3+ ion until oxygen is released.

Question 10

(Inorganic Ions) What is pH calculated based on?

Answer 10

Concentration of hydrogen ions in the environment.

Question 11

(Inorganic Ions) Is the pH higher or lower if more hydrogen is present?

Answer 11

Lower

Question 12

(Inorganic Ions) What are enzyme-controlled reactions all affected by?

Answer 12

pH

Question 13

(Inorganic Ions) A molecule of glucose or an amino acid can be transported into a cell alongside what type of ion?

Answer 13

Sodium

Question 14

(Inorganic Ions) What does a molecule of glucose or an amino acid have to transport across to get into the cell?

Answer 14

Cell-surface membrane.

Question 15

(Inorganic Ions) What is the process of a molecule or glucose or an amino acid transporting into a cell called?

Answer 15

Co-transport

Question 16

(Inorganic Ions) What is it called when a phosphate ion is attached to another molecule?

Answer 16

A phosphate group.

Question 17

(Inorganic Ions) What all contain phosphate groups? (3)

Answer 17

DNA, RNA, and ATP.

Question 18

(Inorganic Ions) What stores the energy in ATP?

Answer 18

The bonds in phosphate groups.

Question 19

(Inorganic Ions) What do the phosphate groups in DNA and RNA allow?

Answer 19

Nucleotides to join up to form polynucleotides.

Question 20

(Inorganic Ions) Where do you find inorganic ions?

Answer 20

In solution, in the cytoplasm of cells and in the bodily fluids of organisms.