Inorganic Ions Flashcards
1
Q
What is an inorganic ion?
A
- an ion that doesn’t contain carbon
- they’re found in solution, in the cytoplasm of cells and in the body fluids of organisms
- each ion had a specific role depending on its properties which determines whether it’s found in high or low concentrations
2
Q
What is an ion?
A
An atom that has an electric charge
3
Q
What’s is an ion with a positive charge called?
A
Cation
4
Q
What’s is an ion with a negative charge called?
A
Anion
5
Q
Why are iron ions an important part of haemoglobin?
A
- Haemoglobin is made up of four different polypeptide chains, each with an iron ion in the centre
- it’s the iron ion that binds to the oxygen in haemoglobin
- when oxygen is bound the Fe2+ ion temporarily becomes Fe3+ ion until oxygen is released
6
Q
What is haemoglobin?
A
haemoglobin is a large protein that carries oxygen around the body in the red blood cells
7
Q
Who do hydrogen ions determine pH?
A
- pH is calculated based on the concentration of hydrogen ions on the environment
- the more H+ present the lower the pH and the more acidic the environment
8
Q
How do sodium ions help transport glucose and amino acids across membranes?
A
- 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 across the cell surface membrane alongside sodium ions (co-transport)
9
Q
Why are phosphate ions an essential component of ATP and DNA?
A
- DNA, RNA and ATP all contain phosphate groups
- the bonds between phosphate groups that store energy in ATP
- the phosphate groups in DNA and RNA allow nucleotides to join up to form the polynucleotides
10
Q
What is a phosphate ion?
A
haemoglobin is a large protein that carries oxygen around the body in the red blood cells
