Difficulty distribution
How the classified questions are distributed by difficulty.
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Practice Analytical Techniques - 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 Analytical Techniques. 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.
Explore previous-paper coverage, trends and focused practice for Spectroscopy and Molecular Analysis.
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Explore previous-paper coverage, trends and focused practice for Immunological Techniques and Flow Cytometry.
Newest papers appear first. Sort by year, question coverage or name.
| Paper | Year / session | Questions in this view | Open |
|---|---|---|---|
| Life Sciences (XL) 2026 | 2026 | 6 | View paper |
| Life Sciences (XL) 2025 | 2025 | 5 | View paper |
| Life Sciences (XL) 2024 | 2024 | 6 | View paper |
| Life Sciences (XL) 2023 | 2023 | 8 | View paper |
| Life Sciences (XL) 2022 | 2022 | 3 | View paper |
| Life Sciences (XL) 2021 | 2021 | 9 | View paper |
| Life Sciences (XL) 2020 | 2020 | 9 | View paper |
| Life Sciences (XL) 2019 | 2019 | 3 | View paper |
| Life Sciences (XL) 2018 | 2018 | 8 | View paper |
| Life Sciences (XL) 2017 | 2017 | 5 | View paper |
| Life Sciences (XL) 2016 | 2016 | 4 | View paper |
| Life Sciences (XL) 2015 | 2015 | 2 | View paper |
| Life Sciences (XL) 2014 | 2014 | 18 | View paper |
| Life Sciences (XL) 2013 | 2013 | 6 | View paper |
| Life Sciences (XL) 2012 | 2012 | 4 | View paper |
| Life Sciences (XL) 2011 | 2011 | 13 | View paper |
| Life Sciences (XL) 2010 | 2010 | 10 | View paper |
| Life Sciences (XL) 2009 | 2009 | 10 | View paper |
| Life Sciences (XL) 2008 | 2008 | 12 | View paper |
| Life Sciences (XL) 2007 | 2007 | 13 | View paper |
A varied preview from the papers represented in this selection, with every available option.
The half-life of 14C is 5730 years. An old sample of wood contains 25% of 14C as would be found in a current living tree. The age of the sample of wood would be
A beam of light passes through 1 cm of a colored solution. Eighty percent of the incident light is transmitted. If the incident light passes through 2 cm of the same solution, the percentage of transmitted light is