RS-T10-Q20 · 呼吸商 RQ「计算与判读」

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 34:00–36:20）

来源 9700_s09_qp_4.pdf → 9700_s09_ms_4.pdf　|　小问：全部小问

触发题型：看到 RQ / 问 RQ = ? / 问由 RQ 推断底物 / 问 RQ>1 说明什么

✅ 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）

(a)(i)

1. 0.72
2. (ii)
3. allow ecf from
4. [1]

(i)

1. RQ value falls steeply, initially / 40–80 min

(b)

1. then, very little change / AW
2. sugar / carbohydrate, metabolised at start
3. named carbohydrate
4. A
5. then fat metabolised
6. (due to) fasting / carbohydrate running out
7. [4 max]
8. increase in rate of respiration

(c)

1. kinetic energy increases / more enzyme-substrate complexes / enzyme activity increases
2. effects of too high a rise in temperature
3. e.g. denaturation of enzymes
4. AVP
5. e.g. Q
6. = 2
7. [2 max]