Inorganic

Question 1

1. What is the difference between organic and inorganic compounds?

Answer 1

Organic compounds are the complex, carbon-containing compounds i.e. carbohydrates, fats, proteins, nucleic acids whereas inorganic compounds are simpler and smaller i.e. water, bases, salts and acids

Question 2

2. What is a polar molecule?

Answer 2

A molecule that carries charges

Question 3

3. Why is water referred to as being a DIPOLE?

Answer 3

It has 2 areas of opposite charge within its structure of two positive hydrogen atoms and one negative oxygen atom

Question 4

4. What makes water molecules cohesive?

Answer 4

Cohesion exists between water molecules due to the fact that hydrogen bonds form between the positive hydrogens and the negative oxygens of the different water molecules

Question 5

5. What compound do calcium ions

Ca2+ form in cell walls?

Answer 5

Calcium pectate

Question 6

6. What are iron ions, Fe’* needed for making?

Answer 6

Haemoglobin, enzymes and cytochromes

Question 7

7. What is phosphate, PO4 2- needed for?

Answer 7

Making ATP, phospholipids, proteins, nucleic acids

Question 8

8. What is nitrate, NO3 needed for?

Answer 8

Nitrogen from nitrate is needed for making amino acids which are used to make proteins, such as enzymes, antibodies and hormones, nucleic acids and chlorophyll

Question 9

9. What compound is magnesium Mg? used to make?

Answer 9

Chlorophyll

Question 10

10. What is a buffer?

Answer 10

A compound that acts in such a way as to resist any change in pH that may occur (due to adding or removing acid or alkali)

Question 11

11. Name two buffers

Answer 11

Sodium or potassium hydrogen carbonate and proteins such as albumen