Biologia IBPaper 1A, specimen 2025wzorowane1 pktzamkniętełatwe (szac.)
Which statement applies to an enzyme while it catalyses its reaction? A. It interacts with a substrate during the catalytic cycle B. It must be exported in a secretory vesicle before acting C. It permanently becomes part of the reaction product D. It increases…
Biologia IBPaper 3, maj 2023, TZ1wzorowane1 pktotwarteśrednie (szac.)
Cut pear tissue normally darkens when oxygen is available because a polyphenol-oxidizing enzyme converts colourless compounds to pigments. A modified line shows no darkening under the same conditions. Suggest why the modified tissue does not darken.