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CAIE A-Level Biology 1.2.1 Eukaryotic Cell Organelles Question Bank

Practise eukaryotic-organelle questions by identifying visible cell structures and linking nuclei, ER, Golgi, mitochondria, chloroplasts or vacuoles to function.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • identify organelles from diagrams, photomicrographs, electron micrographs or density gradients
  • trace secretory proteins through ribosomes, rough ER, Golgi vesicles and exocytosis
  • link organelle structure to roles such as ATP production, photosynthesis, storage or absorption

1.2.1—Eukaryotic cell organelles question 1

[Maximum number: 1]

Prostaglandins are small lipids produced in many tissues of the body. One role of prostaglandins is to cause inflammation at the site of an injury or infection. Inflammation is the normal first response of the immune system to injury or infection.

Cyclooxygenase (COX) is an enzyme that catalyses one of the steps in the reaction pathway for the formation of prostaglandins from phospholipids. The reaction pathway occurs in the smooth endoplasmic reticulum (SER) of cells. Part of the reaction pathway is shown in Fig. 1.3.

Fig. 1.3

Fig. 1.3

Suggest an advantage for this reaction pathway occurring in the smooth endoplasmic reticulum of a cell rather than in the cytoplasm.

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