Please check the examination details below before entering your candidate information Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Wednesday 12 June 2024
Morning (Time: 1 hour 20 minutes) PaperWBI16/01 reference Biology
International Advanced Level
UNIT 6: Practical Skills in Biology II
You must have: Total Marks Scientific calculator, ruler, HB pencil
Instructions
•
• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name, centre number and candidate number.
•
• Answer all questions.
Answer the questions in the spaces provided – there may be more space than you need .
Information
•• The total mark for this paper is 50.
The marks for each question are shown in brackets – use this as a guide as to how much time to spend on each question . https://bit.ly/APEdexcel
Advice
••• Read each question carefully before you start to answer it.
Try to answer every question.
Check your answers if you have time at the end. P75777A
©2024 Pearson Education Ltd.*P75777A0120*
F:1/1/1/1/1/1/1/
Answer ALL questions.
1 Saccharomyces cerevisiae is a type of yeast. It is a single-celled organism which is widely used in brewing and baking. The photograph shows yeast cells seen through a microscope.
(Source: © Kateryna Kon/Shutterstock) (a) Most of the ATP produced when yeast respires aerobically comes from oxidative phosphorylation in the mitochondria. Oxidative phosphorylation requires a source of hydrogen ions and the movement of
electrons.
(i)State the location in the mitochondria where oxidative phosphorylation takes place.
(1)
2Turn over DO NOT W
RITE IN THIS AREA DO NOT W
RITE IN THIS AREA DO NOT W
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(ii)Name one molecule that carries hydrogen for use in oxidative phosphorylation.
(1)
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*P75777A0220* (b) Describe an experiment to investigate the effect of temperature on the rate of respiration in yeast, using an artificial hydrogen carrier (redox indicator).
(5)
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3
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Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Wednesday 12 June 2024
Morning (Time: 1 hour 20 minutes) PaperWBI16/01 reference Biology
International Advanced Level
UNIT 6: Practical Skills in Biology II
You must have: Total Marks Scientific calculator, ruler, HB pencil
Instructions
•
• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name, centre number and candidate number.
•
• Answer all questions.
Answer the questions in the spaces provided – there may be more space than you need .
Information
•• The total mark for this paper is 50.
The marks for each question are shown in brackets – use this as a guide as to how much time to spend on each question . https://bit.ly/APEdexcel
Advice
••• Read each question carefully before you start to answer it.
Try to answer every question.
Check your answers if you have time at the end. P75777A
©2024 Pearson Education Ltd.*P75777A0120*
F:1/1/1/1/1/1/1/
Answer ALL questions.
1 Saccharomyces cerevisiae is a type of yeast. It is a single-celled organism which is widely used in brewing and baking. The photograph shows yeast cells seen through a microscope.
(Source: © Kateryna Kon/Shutterstock) (a) Most of the ATP produced when yeast respires aerobically comes from oxidative phosphorylation in the mitochondria. Oxidative phosphorylation requires a source of hydrogen ions and the movement of
electrons.
(i)State the location in the mitochondria where oxidative phosphorylation takes place.
(1)
2Turn over DO NOT W
RITE IN THIS AREA DO NOT W
RITE IN THIS AREA DO NOT W
RITE IN THIS AREA https://bit.ly/APEdexcel
....................................................................................................................................................................................................................................................................................
(ii)Name one molecule that carries hydrogen for use in oxidative phosphorylation.
(1)
....................................................................................................................................................................................................................................................................................
*P75777A0220* (b) Describe an experiment to investigate the effect of temperature on the rate of respiration in yeast, using an artificial hydrogen carrier (redox indicator).
(5)
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....................................................................................................................................................................................................................................................................................
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3
Turn over DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
