Zadanie 1b
Explain how you would prepare a temporary mount of a thin leek leaf epidermal peel and obtain a clear view of its cells with a light microscope.
Biological experimental methods
Choose and use biological laboratory and field methods, including microscopy, specimen preparation, dilution, chromatography, colorimetry and sampling; explain measurement procedures and relevant safety, ethical and environmental precautions.
Tę umiejętność sprawdza 10 zadań wzorowanych na arkuszach IB z lat 2023–2026.
Zadania sprawdzające tę umiejętność: 10 Otwórz w wyszukiwarce z filtrami
Zadanie 2b
Describe how the bath temperature could be checked during each incubation to establish that it stayed constant.
Zadanie 3b
After a run, the student opens the tap and pushes air from the syringe into the apparatus. Outline how this permits a repeat reading.
- Materiał graficzny
Zadanie 4d
Suggest how the percentage decolourization could be measured.
- Materiał graficzny
Zadanie 4a
(i) State why an ordinary millimetre ruler is unsuitable for precise direct measurement. (ii) Suggest a suitable measurement method.
- Materiał graficzny
Zadanie 2b
Outline how to prepare 100 g of a 12% by-mass protein mixture.
- Materiał graficzny
Zadanie 4
A neuroscience team compares ways to investigate the roles of different brain regions. Suggest one advantage of an appropriately designed animal experiment over a comparable invasive experiment in humans.
Zadanie 4b
State one method other than post-mortem examination for investigating the function of brain regions.
- Materiał graficzny
Zadanie 10d
Distinguish between this method and an antibiotic-disc inhibition-zone test, referring to antibiotic placement and measurement of its effect.
- Materiał graficzny
Zadanie 10d
Distinguish between this method and an antibiotic-disc inhibition-zone test, referring to antibiotic placement and measurement of its effect.
- Materiał graficzny