IB Biology HL A2.2 Cell Structure Question Bank

Practise IB Biology HL A2.2 with micrograph and data questions on cell theory, organelles, compartmentalization, microscopy and structure–function evidence.

Exam points

identify organelles and compare prokaryotic and eukaryotic cell structure using micrographs
explain compartmentalization and structure–function relationships in cells and organelles
analyse microscope images and measurements to infer cell structures and functions

Covered syllabus points

A2.2.1—Cells as basic structural unit A2.2.2—Microscopy skills A2.2.3—Developments in microscopy A2.2.4—Structures common to all cells A2.2.5—Prokaryote cell structure A2.2.6—Eukaryote cell structure A2.2.7—Processes of life in unicellular organisms A2.2.8—Differences in eukaryotic cells A2.2.9—Atypical cell structure A2.2.10—Cell identification in micrographs A2.2.11—Drawing and annotation A2.2.12 (HL)—Endosymbiosis origin of eukaryotes A2.2.13 (HL)—Cell differentiation A2.2.14 (HL)—Evolution of multicellularity

[Maximum number: 3]

(a)

Outline the cell theory.

[ 2 ]

(b)

Calculate the magnification of the electron micrograph.

[ 1 ]

$\quad \times 15000$ (accept answers in the range of $\times 14000$ to $\times 16000$ )

[Maximum number: 1]

The images of the radiolarian, a single-celled marine organism, were produced using a light microscope (left) and a scanning electron microscope (right).

Figure for Question A2.2 Cell structure question 2 — IB Biology HL

What is a reason for the difference in quality of these images?

Light cannot pass through the specimen.

Higher magnification can be achieved with the electron microscope.

The resolution of the electron microscope is higher.

Samples are stained with methylene blue when viewed with the light microscope.

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Covered syllabus points

A2.2 Cell structure question 1

Question (a)

Question (b)

A2.2 Cell structure question 2