Plants store energy as starch. Starch is a natural condensation polymer made from glucose, $C6H12O6\mathrm{C_{6}H_{12}O_{6}}$ . Each time a glucose molecule joins the chain, one water molecule is released.

Relative atomic masses: H = 1, C = 12, O = 16

Name the monomers of proteins and of DNA.

Calculate the relative formula mass, $M_{r}$ , of glucose.

Each glucose unit in a starch chain adds 162 to the $M_{r}$ of the chain. Explain why this is less than the $M_{r}$ of glucose.

The $M_{r}$ of a starch chain made from $n\,$ glucose molecules is $(162 n + 18)$ . A starch molecule has an $M_{r}$ of 162 018.

Calculate the number of glucose units in this molecule.

Starch molecules in a sample do not all have the same $M_{r}$ . Explain why scientists give an average $M_{r}$ for a polymer.

Relative atomic masses: H = 1, C = 12, O = 16

Name the monomers of proteins and of DNA.

Calculate the relative formula mass, $M_{r}$ , of glucose.

Each glucose unit in a starch chain adds 162 to the $M_{r}$ of the chain. Explain why this is less than the $M_{r}$ of glucose.

The $M_{r}$ of a starch chain made from $n\,$ glucose molecules is $(162 n + 18)$ . A starch molecule has an $M_{r}$ of 162 018.

Calculate the number of glucose units in this molecule.

Starch molecules in a sample do not all have the same $M_{r}$ . Explain why scientists give an average $M_{r}$ for a polymer.

10.3 Polymers

Question 10

Markscheme

10.3 Polymers

Question 10

Markscheme

10.3 Polymers

Question 10

10.3 Polymers Questions

10.3 Polymers

Question 10

10.3 Polymers Questions