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CAIE A-Level Biology 1.2 Cells as Basic Units of Living Organisms Question Bank

Practise cell-structure questions by identifying organelles, interpreting micrographs and comparing plant, animal, prokaryotic and viral organisation.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • identify organelles and functions from labelled diagrams, sections and electron micrographs
  • compare plant, animal and prokaryotic cells using membranes, walls, DNA and ribosomes
  • distinguish virus structure, envelopes and RNA translation from cellular organisation

Covered syllabus points

1.2.1—Eukaryotic cell organelles1.2.2—Cell images and drawings1.2.3—Plant and animal cell comparison1.2.4—ATP in cells1.2.5—Prokaryotic cell features (bacteria)1.2.6—Prokaryotes vs eukaryotes1.2.7—Virus structure and envelope

1.2 Cells as Basic Units of Living Organisms 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.

1.2 Cells as Basic Units of Living Organisms question 2

[Maximum number: 1]

Which features are found in typical eukaryotes and also in typical bacteria?

Figure for Question 1.2 Cells as Basic Units of Living Organisms question 2 — CAIE A-Level Biology AS
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