RS-T09-Q17 · 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_w16_qp_41.pdf → 9700_w16_ms_41.pdf　|　小问：b、c

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）

8(b)(i)

1. absorbs carbon dioxide ;

8(b)(ii)

1. three from
2. used in, oxidative phosphorylation / ETC ;
3. final electron acceptor ;
4. proton acceptor ;
5. forms water ;
6. allows ETC to continue ;
7. ref. to ATP produced ;

8(c)(i)

1. equilibration / acclimatising / adjusting ;

8(c)(ii)

1. two from
2. act as a control ;
3. idea of control eliminates effects of variables other than, the independent variable / temperature ;
4. (changes in A and C are) due to, seeds / respiration ; ora

8(c)(iii)

1. 0.087 ; ;
2. allow one mark for
3. 1.7
4. 0.4
5. 1.3
6. 15 1.3
7. 1.7
8. 0.4
9. or
10. 0.08666

8(c)(iv)

1. at 25°C (ora for 10°C)
2. two from
3. increased kinetic energy ;
4. enzymes involved ;
5. idea of more ESCs ;

8(c)(v)

1. enzymes denatured ;
2. detail ; e.g. change in active site (shape) / H bonds break