Biology > AQA Questions and Marking Scheme > A-level BIOLOGY 7402/1 Paper 1 Mark scheme June 2020 Version: 1.0 Final (All)

A-level BIOLOGY 7402/1 Paper 1 Mark scheme June 2020 Version: 1.0 Final

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1. (Maintains/generates) a concentration/diffusion gradient for Na+ (from ileum into cell); 2. Na+ moving (in) by facilitated diffusion, brings glucose with it OR Na+ moving (in) by co-tr... ansport, brings glucose with it; 2 1. Accept ‘(Maintains/generates) a lower concentration of Na+ inside the cell compared with outside the cell’. 2. Accept ‘co-transporter’ for ‘co-transport’. 01.1 1. (ATP to ADP + Pi ) Releases energy; 2. (energy) allows ions to be moved against a concentration gradient OR (energy) allows active transport of ions; 2 1. Reject ‘produces/makes/creates energy’. 2. For ‘ions’ accept Na+ or K + . 2. Do not accept if this movement is of glucose not ions.... [Show More]

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