From Paper 1: Advanced Biochemistry, Microbiology and Genetics
5(a)4 marks
Describe the link reaction and the Krebs cycle.
From Paper 1: Advanced Biochemistry, Microbiology and Genetics
5(b)4 marks
Explain how ATP is produced by chemiosmosis in mitochondria.
From Paper 1: Advanced Biochemistry, Microbiology and Genetics
5(c)3 marks
In a respirometer, woodlice took up 0.84 cm³ of oxygen in 12 minutes. The total mass of the woodlice was 1.4 g. Calculate the rate of oxygen uptake in cm³ g⁻¹ h⁻¹.
From Paper 1: Advanced Biochemistry, Microbiology and Genetics
5(d)3 marks
Explain what happens to lactate after a period of intense exercise.
From Paper 1: Advanced Biochemistry, Microbiology and Genetics
6(a)1 mark
Which of the following is produced by the photolysis of water?
From Paper 1: Advanced Biochemistry, Microbiology and Genetics
6(b)4 marks
Compare cyclic and non-cyclic photophosphorylation.
From Paper 1: Advanced Biochemistry, Microbiology and Genetics
6(c)4 marks
Figure 1 shows the concentrations of GP and RuBP in a chloroplast suspension. The light was switched off at 10 minutes.
Explain the changes in GP and RuBP after the light is switched off.
Figure 1: light switched off at 10 minutes
From Paper 1: Advanced Biochemistry, Microbiology and Genetics
6(d)3 marks
Describe how thin-layer chromatography can be used to separate photosynthetic pigments.
From Paper 3: General and Practical Principles in Biology
6(a)4 marks
Describe how you could investigate the effect of light intensity on the rate of photosynthesis using pondweed.
From Paper 3: General and Practical Principles in Biology
6(b)4 marks
At a distance of 10 cm, the rate of oxygen production was 24 mm³ h⁻¹. At 20 cm it was 7 mm³ h⁻¹. Calculate the relative light intensity at 20 cm compared with 10 cm, and suggest why the rate fell by a different proportion.
Score 0 / 34 · 0 of 10 marked
This paper is written by Plasmo in the style of the Edexcel A-Level Biology exam. It is not a past paper and is not produced or endorsed by the exam board.
Energy for biological processes Exam Questions: Edexcel A-Level Biology | Plasmo