0654.B6.1.07 — Understand and describe the effect of light and dark conditions on gas exchange in an aquatic plant using hydrogencarbonate indicator soluti: past paper questions
Real questions on 0654.b6.1.07 — understand and describe the effect of light and dark conditions on gas exchange in an aquatic plant using hydrogencarbonate indicator soluti
The newest 7 of 7 written questions. Open one to see it on the real paper.
- 0973/41 · May/June 2023 · Q4d(i)[2]
Calculate the mean number of oxygen bubbles released when the lamp is 30 cm from the aquatic plant. Give your answer to the nearest whole number. Write your answer in Table 4.1.
See it on the paper → - 0973/41 · May/June 2023 · Q4d(ii)[2]
Describe the effect of light intensity on the rate of photosynthesis using the data in Table 4.1.
See it on the paper → - 0973/31 · May/June 2020 · Q4a(i)[1]
The aquatic plant releases bubbles of gas. Name the gas the bubbles are made from.
See it on the paper → - 0973/31 · May/June 2020 · Q4a(ii)[1]
The investigation was repeated with the filament lamp removed. Explain why the number of bubbles produced decreases.
See it on the paper → - 0973/41 · May/June 2019 · Q1a(i)[2]
Describe the results shown in Fig. 1.1.
See it on the paper → - 0973/41 · May/June 2019 · Q1a(ii)[2]
Explain the reasons for the shape of the part of the graph labelled X.
See it on the paper → - 0973/42 · May/June 2019 · Q13a(i)[3]
Explain why producers underneath the surface of the water die.
See it on the paper →
What examiners said
Almost all candidates were able to correctly calculate the mean. Only a handful failed to round to the nearest whole number.
— Examiner report, May/June 2023, 0973/41 Q4(d)(i) (Cambridge)
The relationship between light intensity and the rate of photosynthesis was almost universally identified. Fewer candidates, however, identified that the rate of photosynthesis became constant after a distance of 40 cm was reached.
— Examiner report, May/June 2023, 0973/41 Q4(d)(ii) (Cambridge)
Most candidates recognised that the rate of photosynthesis initially increased with increasing light intensity, after which the rate stayed constant. Some suggested incorrectly that photosynthesis stopped.
— Examiner report, May/June 2019, 0973/41 Q1(a)(i) (Cambridge)
Past papers, syllabus and examiner reports © UCLES (Cambridge University Press & Assessment). Questions are matched to topics from the official syllabus. AssessPro is independent and not endorsed by Cambridge.