A recycling process completely hydrolyses one chain from a protein fibre and one chain from a starch film. The two product streams are not labelled.
| Product stream | Number of individual molecules | Number of different types of molecule | Elements present |
|---|---|---|---|
| R | 86 | 12 | carbon, hydrogen, oxygen and nitrogen |
| S | 240 | 1 | carbon, hydrogen and oxygen |
The process needs recovered molecules that can be used to manufacture a new starch film.
Explain which product stream should be used to manufacture the new starch film.
Calculate the total number of water molecules used to produce both product streams.
113 exam-style questions on OCR GCSE Biology 1.3 Respiration, covering 1.3.1 Cellular respiration supplies ATP, 1.3.2 Aerobic and anaerobic respiration, 1.3.3 Sugars and carbohydrates, 1.3.4 Amino acids and proteins, and 1.3.5 Fatty acids and lipids. Each one has a worked solution and a mark scheme showing where the marks go.