Compare each of the following processes:

Mark scheme

Marking points from the official mark scheme (May/June 2017). The mark or mark type is shown in brackets.

1. [3] 9(a) glucose + required for both; complete or incomplete breakdown (of glucose); ref. oxygen requirement; amount of energy released;
2. [3] 9(b) glucose + required for both; reference to oxygen debt AW; lactic acid; carbon dioxide; alcohol / ethanol ;
3. [4] 9(c) movement of particles / molecules / named molecule ; concentration gradient; membrane requirement; living cell requirement ; energy requirement ; (energy from) respiration; correct example;