AQA, OCR, Edexcel A Level A Level Biology

Visit for more fantastic resources. AQA, OCR, Edexcel A Level A Level Biology Biological Molecules and Enzyme Answers Name: Total Marks: Page 1. Visit for more fantastic resources. M1.(a) C. 1. (b) E. 1. (c) 1. Active site (of enzyme) has (specific) shape / tertiary structure / active site complementary to substrate / maltose;. Reject active site on substrate. Must have idea of shape Assume it = maltase Accept (specific) 3D active site Reject has same shape 2. (Only) maltose can bind / fit;. Accept substrate for maltose . 3. To form enzyme substrate complex. Accept E S complex 3. [5]. M2. (a) (i) Changes shape of antitrypsin;. Reference to hydrogen/ionic/disulfide bonds;. No longer attaches to/interacts/ reacts with trypsin.

37°C = 0.16g dm–3 –s–1 –/9.6g dm 3 minute 1 2 (c) At 60 °C: 1. More kinetic energy; 2. More E–S complexes formed. Allow converse for 37 °C 2 (d) Different times: 1. Higher temperature / 60 °C causes denaturation of all of enzyme; Accept converse for 37 °C 2. Reaction stops (sooner) because shape of active site changed;

Loading..

Tags:

  Levels, Edexcel, Edexcel a level

Information

Related search queries