Zadanie 7, Paper 2, maj 2023, TZ2, Biologia IB SL
Wzorowane na: Biology SL Paper 2, May 2023, TZ2, pytanie 7. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
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Zadanie
Polecenie
(a) Describe organelles and other structures of animal cells as they can appear in electron micrographs.
(b) Explain how animal cells supply their ATP requirements.
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Odpowiedź z klucza
(a)
The plasma membrane forms a thin outer boundary. ✔
Cytoplasm occupies the interior around the nucleus. ✔
A nuclear envelope encloses the nucleus. ✔
Chromosomes occur inside the nucleus OR are visible during mitosis OR appear as rod-like structures. ✔
Mitochondria have two membranes OR have folds called cristae. ✔
Ribosomes appear as small particles, free or associated with rough ER. ✔
ER is an interconnected membrane system OR rough ER bears ribosomes OR smooth ER does not bear ribosomes. ✔
Golgi cisternae form a stack OR have curved membranes OR have budding vesicles. ✔
Vesicles are small membrane-bound compartments. ✔
Lysosomes contain digestive enzymes OR can appear densely stained. ✔
Another correctly described visible cell structure can be credited. ✔
(b)
They carry out cellular respiration. ✔
Energy is released from glucose, lipids or other organic substrates. ✔
Anaerobic respiration does not require oxygen. ✔
Anaerobic metabolism in human muscle produces lactate. ✔
Aerobic respiration uses oxygen. ✔
Aerobic oxidation produces carbon dioxide and water. ✔
Mitochondria carry out aerobic respiration (following glycolysis in the cytoplasm). ✔
Aerobic respiration has a greater ATP yield per glucose than anaerobic respiration. ✔
Quality of communication: The complete response is clear and concise, with little repetition or irrelevant material. ✔
Schemat punktowania
Part (a): Award any 7 of the listed points; maximum 7 marks. Part (b): Award any 5 of the listed points; maximum 5 marks. Award 1 independent communication mark across the retained response. Maximum 13 marks. Clearly annotated diagrams may earn the corresponding points; labels alone do not suffice.