Zadanie 1a
The DNA genome of P contains 58 million adenine–thymine pairs. Deduce its number of cytosine–guanine pairs.
Biology SL Paper 1B, May 2025, TZ2
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 13 zadań z tego arkusza, razem 23 punkty, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (5), Abiotic limits on species distributions (2), The flowering plant sexual life cycle (2).
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Dodaj cały arkusz do zestawuZadanie 1b
State one organelle in which paired nucleic-acid bases occur.
Zadanie 1c
Discuss present and potential uses of whole-genome sequencing.
Zadanie 2a
(i) Identify two species whose distributions suggest adaptation to similar abiotic conditions. (ii) Identify the least abundant species across the transect.
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Zadanie 2b
Discuss why P occurs near the beginning of the transect while V occurs from about 15 m to 30 m.
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Zadanie 2c
These seaweeds are obligate aerobes. Describe a necessary environmental condition for their survival.
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Zadanie 3a
Determine one laccase concentration within the most effective high-decolourization region shown.
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Zadanie 3b
Predict the percentage decolourization at a laccase concentration of 6.0 mg mL−1.
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Zadanie 3c
Deduce what the overlapping error bars at 3.6 and 4.8 mg mL−1 suggest about the difference between these means.
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Zadanie 3d
Describe the relationship between laccase loading concentration and mean decolourization.
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Zadanie 3e
Discuss two variables that should be controlled in this investigation.
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Zadanie 4a
List two structures where meiosis occurs in this plant.
Zadanie 4b
(i) Define pollination. (ii) Outline how flowering plants can promote cross-pollination.