RS-T09-Q18 · 呼吸速率测定「呼吸计实验」

先自己写完再对答案；卡住的地方回看这段讲解（公开课时间码 30:40–34:00）

来源 9700_s25_qp_41.pdf → 9700_s25_ms_41.pdf　|　小问：全部小问

触发题型：P5 高频：看到 respirometer / 问 KOH 作用 / 问如何测呼吸速率 / 问对照与变量控制

✅ Mark Scheme 得分点（原文）

逐条计分：n 分写 n 条；红字为考官明确不接受（Do not accept）

2(a)

1. any four from:
2. sodium hydroxide absorbs, carbon dioxide / CO2, released by, woodlice / respiration ;
3. oxygen / O2, taken in reduces pressure (in boiling tube) ;
4. drop of liquid moves towards, boiling tube / bung / woodlice / left ;
5. measure, distance / length, moved by drop, in set time ;
6. rate = distance divided by time ;
7. detail of calculation of volume of O2 used ;

2(b)

1. rate at 5 °C:
2. lower / slower
3. and
4. less / lower, kinetic energy
5. or
6. fewer enzyme-substrate, collisions / complexes
7. or
8. fewer, enzyme-catalysed / respiration / glycolysis / link reaction / Krebs cycle, reactions ;