Zadanie 1a
(i) Identify the base X paired with adenine. (ii) Suggest one benefit and one limitation of molecular visualization.
- Materiał graficzny
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 15 zadań z tego arkusza, razem 35 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Planning a biological investigation (2), Evaluating biological evidence and methods (2), Biological calculations, statistics and graphs (2).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawu(i) Identify the base X paired with adenine. (ii) Suggest one benefit and one limitation of molecular visualization.
Describe the structure of a nucleosome.
Explain how methylation associated with nucleosomes can affect transcription.
(i) State the dependent variable. (ii) Identify what the isolated circles represent.
Deduce whether method B is a reasonable substitute for method A from these summaries.
Evaluate the design of this investigation.
Explain why the recorded angles are smaller with the finger extended than flexed.
State the instrument used to display resting and action-potential voltage signals.
(i) Distinguish standard deviation from standard error. (ii) Suggest why the C-fibre SD is not reported for animal10.
(i) Calculate the ratio of the overall C-fibre speed to the overall L-fibre speed. (ii) Suggest one reason for the faster C-fibre conduction.
Explain saltatory conduction in a myelinated axon.
(i) State why an ordinary millimetre ruler is unsuitable for precise direct measurement. (ii) Suggest a suitable measurement method.
List two variables to hold constant.
Describe the trend in mandible length in the predator treatment.
Explain how predation can produce the observed evolutionary change.
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