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Practice Cell Biology - Life Sciences previous year questions organised from real papers, with year-wise coverage and clear topic navigation.
Every graph below is calculated only from this selection.
Year-wise coverage for Cell Biology. Each bar uses a separate theme-derived color.
How the classified questions are distributed by difficulty.
MCQ, numerical, multiple-select and other formats found in these papers.
Top subjects by unique question coverage.
Top topics across the included previous year papers.
Top subtopics inside this exact selection.
Question coverage for the most populated papers. Every active PYP paper remains listed below.
Open a focused page built from the same verified paper data.
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| Paper | Year / session | Questions in this view | Open |
|---|---|---|---|
| Life Sciences (XL) 2026 | 2026 | 1 | View paper |
| Life Sciences (XL) 2025 | 2025 | 2 | View paper |
| Life Sciences (XL) 2024 | 2024 | 1 | View paper |
| Life Sciences (XL) 2023 | 2023 | 3 | View paper |
| Life Sciences (XL) 2022 | 2022 | 1 | View paper |
| Life Sciences (XL) 2021 | 2021 | 3 | View paper |
| Life Sciences (XL) 2020 | 2020 | 1 | View paper |
| Life Sciences (XL) 2019 | 2019 | 3 | View paper |
| Life Sciences (XL) 2018 | 2018 | 2 | View paper |
| Life Sciences (XL) 2017 | 2017 | 3 | View paper |
| Life Sciences (XL) 2016 | 2016 | 1 | View paper |
| Life Sciences (XL) 2015 | 2015 | 1 | View paper |
| Life Sciences (XL) 2014 | 2014 | 2 | View paper |
| Life Sciences (XL) 2013 | 2013 | 2 | View paper |
| Life Sciences (XL) 2012 | 2012 | 1 | View paper |
| Life Sciences (XL) 2011 | 2011 | 2 | View paper |
| Life Sciences (XL) 2010 | 2010 | 2 | View paper |
| Life Sciences (XL) 2009 | 2009 | 4 | View paper |
| Life Sciences (XL) 2008 | 2008 | 1 | View paper |
| Life Sciences (XL) 2007 | 2007 | 7 | View paper |
A varied preview from the papers represented in this selection, with every available option.
Which of the following enzyme activities can be detected in the supernatant obtained by centrifugation of liver homogenate at 100,000 g for 1 hr at 4°C?
Cytochrome C is normally found in the inner mitochondrial membrane. It is released into the cytoplasm during