BiologyYear 11 · Module 2Checkpoint Quiz

Checkpoint Quiz 1, Lessons 1–5

Test the content covered so far: multicellular organisation, cell specialisation, tissues, organs, organ systems and review applications.

19 questions15 MC + 4 short answer
Lessons covered L1 · L2 · L3 · L4 · L5
Suggested time20–25 minutes
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Coverage Check

Section A, Multiple Choice

15 questions · 1 mark each

1. Which statement best defines a colonial organism?

A
A single cell that performs every life function alone.
B
A group of genetically identical cells living together while each cell can still survive independently.
C
A tissue formed by many permanently specialised cells.
D
A single eukaryotic cell containing more than one nucleus.

2. What is the key difference between colonial and multicellular organisms?

A
Colonial organisms are always microscopic, while multicellular organisms are always visible.
B
Multicellular organisms contain membrane-bound organelles, while colonial organisms do not.
C
Cells in multicellular organisms are permanently specialised and usually cannot survive independently.
D
Colonial organisms reproduce only asexually, while multicellular organisms reproduce only sexually.

3. Which feature of Volvox shows an early form of division of labour?

A
All cells in the colony are identical and perform the same role.
B
The colony has no communication between neighbouring cells.
C
Gonidia specialise in reproduction while somatic cells handle movement and photosynthesis.
D
Volvox cells lack chloroplasts, so they rely on other organisms for energy.

4. Cell differentiation occurs because:

A
different cells inherit different DNA sequences during cell division.
B
mutations during development alter the genetic code of each cell type.
C
cells with identical DNA selectively express different subsets of genes in response to chemical signals.
D
cells permanently lose unnecessary genes as they mature.

5. Which structural feature of a red blood cell directly improves gas exchange efficiency?

A
biconcave disc shape, which increases the surface area to volume ratio.
B
a large nucleus containing the genes for haemoglobin synthesis.
C
numerous mitochondria providing ATP for active transport of oxygen.
D
a thick rigid cell wall preventing deformation in capillaries.

6. A cell packed with actin, myosin, and many mitochondria is most likely a:

A
goblet cell.
B
palisade mesophyll cell.
C
root hair cell.
D
muscle cell.

7. Which definition best describes a tissue?

A
a single specialised cell performing a specific function.
B
a group of similar cells with a shared structure working together to perform a specific function.
C
a collection of different cell types performing different functions in one location.
D
any group of cells found in the same organ.

8. Blood is classified as which type of tissue?

A
epithelial tissue, because it lines blood vessels.
B
muscle tissue, because it is pumped by the heart.
C
connective tissue, because cells are dispersed in a liquid extracellular matrix.
D
nervous tissue, because it carries signals around the body.

9. Why are xylem cells dead at maturity?

A
Death removes the cell contents, leaving hollow lignified tubes for water flow and structural support.
B
Dead cells require less energy from the plant, reducing the metabolic cost of transport.
C
Dead cells cannot be detected by pathogens, protecting the transport system from disease.
D
Dead cells have thinner walls, allowing water to pass through more easily.

10. Which statement correctly distinguishes an organ from a tissue?

A
An organ is always larger than a tissue.
B
A tissue contains specialised cells, whereas an organ does not.
C
An organ is composed of two or more tissue types working together, whereas a tissue consists of similar cells performing a shared function.
D
An organ is found only in animals, whereas tissues are found in both animals and plants.

11. The ability of the heart to pump blood is best described as:

A
a property of cardiac muscle cells that is lost when cells form tissue.
B
an emergent property arising from integration of multiple tissue types at the organ level.
C
a property suppressed until the organ is fully formed.
D
a property that arises only at the organ system level.

12. Which structure is correctly classified as an organ?

A
The stomach, because it contains multiple tissue types working together.
B
A tendon, because it is a large specialised structure.
C
Cardiac muscle, because it consists of specialised contractile cells.
D
The digestive system, because it performs complete digestion.

13. What is the critical distinction between colonial and multicellular organisms?

A
Colonial organisms contain more cells.
B
In multicellular organisms, cells are permanently specialised and cannot survive independently, whereas colonial cells can.
C
Colonial organisms are prokaryotic while multicellular organisms are eukaryotic.
D
Multicellular organisms reproduce sexually while colonial organisms do not.

14. A cell with no nucleus, no mitochondria, a biconcave shape, and a red iron-containing protein is most likely a:

A
goblet cell
B
palisade mesophyll cell
C
stem cell
D
red blood cell

15. Which tissue type is correctly matched to a key structural feature?

A
Epithelial tissue, tightly packed cells forming a continuous sheet on a basement membrane.
B
Connective tissue, cells arranged in parallel layers with no extracellular matrix.
C
Nervous tissue, cells packed tightly with striations from actin and myosin.
D
Muscle tissue, cells dispersed widely in a fluid, gel, or solid matrix.

Section B, Short Answer

4 questions · structure-function focus

16. Explain why surface area to volume ratio creates a size limit for single-celled organisms. 3 MARKS

17. Compare colonial organisms and true multicellular organisms. 4 MARKS

18. Choose one specialised cell and explain how its structure suits its function. 4 MARKS

19. Explain the hierarchy from cells to organism using one example. 4 MARKS

Answers, Section A

▼

1. B Colonial organisms are groups of similar cells living together, but unlike true multicellular organisms their cells are not permanently interdependent.

2. C Permanent specialisation and interdependence mark the jump from colonial organisation to true multicellularity.

3. C Volvox is important because some cells are already taking on different jobs, even though the colony has not reached full multicellularity.

4. C Differentiation is driven by selective gene expression, not different DNA content.

5. A The biconcave shape increases membrane surface for diffusion while keeping the diffusion path short.

6. D Actin and myosin are contractile proteins, and a high mitochondrial count supports the ATP demand of contraction.

7. B Tissues are made of similar cells organised for a shared function.

8. C Blood fits connective tissue because its cells are suspended in plasma, an extracellular matrix.

9. A The structure works precisely because the living contents are gone and the lignified tube remains.

10. C The key structural distinction is integration of multiple tissue types at the organ level.

11. B The pumping function emerges when multiple tissues are integrated into the heart as an organ.

12. A The stomach is an organ because it integrates epithelial, connective, muscle, and nervous tissue.

13. B Permanent interdependence is the defining distinction.

14. D Each feature points to a red blood cell specialised for oxygen transport.

15. A The other answers swap structural features between tissue types.

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