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Cell Structure and Function Practice Tests

These Grade 9 Biology practice tests focus on how cells are organized and how their structures support life. Review cell theory, prokaryotic and eukaryotic cells, organelles, membranes, transport, microscopy, cell division, and specialized cells.

Skills covered

  • Comparing prokaryotic and eukaryotic cells and applying the principles of cell theory
  • Identifying organelles such as the nucleus, mitochondria, chloroplasts, ribosomes, Golgi apparatus, lysosomes, vacuoles, and endoplasmic reticulum
  • Explaining diffusion, osmosis, facilitated diffusion, active transport, endocytosis, and exocytosis
  • Interpreting magnification, resolution, staining, wet mounts, and microscope observations
  • Connecting mitosis, cytokinesis, stem cells, apoptosis, cell specialization, and structure-function relationships

How to use these practice tests

For each question, identify the structure or process, connect it to its function, and check whether matter or energy moves across a membrane. Use the explanations to strengthen cell biology vocabulary and prepare for Grade 9 Science assessments.

For more Grade 9 Science practice, return to the Grade 9 Science category.

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Grade 9 Cell Structure and Function Practice Tests

Practice Grade 9 Science questions about cell theory, prokaryotic and eukaryotic cells, organelles, membranes, transport, microscopy, cell division, and specialized cells.

Choose the best answer. Connect each cell structure with its function, track how substances move, and use evidence from microscopy or cell biology scenarios.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What does it mean that the cell membrane is selectively permeable?

Please select an answer first.

Correct answer: A

The correct answer is It allows some substances to cross more easily than others..

  1. Identify the cell biology concept: Determine whether the question focuses on cell structure, organelle function, transport, microscopy, division, or specialization.
  2. Connect structure and function: Selective permeability lets a cell regulate its internal conditions by controlling which substances cross the membrane.
  3. Check the answer: The correct answer is It allows some substances to cross more easily than others..

Selective permeability lets a cell regulate its internal conditions by controlling which substances cross the membrane.

2. QuestionMultiple choice

In simple diffusion, particles move from an area of _____.

Please select an answer first.

Correct answer: B

The correct answer is Higher concentration to lower concentration..

  1. Identify the cell biology concept: Determine whether the question focuses on cell structure, organelle function, transport, microscopy, division, or specialization.
  2. Connect structure and function: Diffusion is passive movement down a concentration gradient and does not require cellular energy.
  3. Check the answer: The correct answer is Higher concentration to lower concentration..

Diffusion is passive movement down a concentration gradient and does not require cellular energy.

3. QuestionMultiple choice

What is osmosis?

Please select an answer first.

Correct answer: C

The correct answer is The diffusion of water across a selectively permeable membrane..

  1. Identify the cell biology concept: Determine whether the question focuses on cell structure, organelle function, transport, microscopy, division, or specialization.
  2. Connect structure and function: Osmosis is the passive movement of water across a selectively permeable membrane toward the side with lower water concentration.
  3. Check the answer: The correct answer is The diffusion of water across a selectively permeable membrane..

Osmosis is the passive movement of water across a selectively permeable membrane toward the side with lower water concentration.

4. QuestionMultiple choice

Why does active transport require ATP?

Please select an answer first.

Correct answer: D

The correct answer is It moves substances against a concentration gradient..

  1. Identify the cell biology concept: Determine whether the question focuses on cell structure, organelle function, transport, microscopy, division, or specialization.
  2. Connect structure and function: Active transport uses energy to move substances from lower concentration to higher concentration or otherwise against a gradient.
  3. Check the answer: The correct answer is It moves substances against a concentration gradient..

Active transport uses energy to move substances from lower concentration to higher concentration or otherwise against a gradient.

5. QuestionMultiple choice

What is facilitated diffusion?

Please select an answer first.

Correct answer: A

The correct answer is Passive movement through membrane proteins without ATP..

  1. Identify the cell biology concept: Determine whether the question focuses on cell structure, organelle function, transport, microscopy, division, or specialization.
  2. Connect structure and function: Facilitated diffusion uses channel or carrier proteins to move substances down their gradients without energy from ATP.
  3. Check the answer: The correct answer is Passive movement through membrane proteins without ATP..

Facilitated diffusion uses channel or carrier proteins to move substances down their gradients without energy from ATP.

6. QuestionMultiple choice

What happens during endocytosis?

Please select an answer first.

Correct answer: B

The correct answer is The cell membrane surrounds and brings material into the cell..

  1. Identify the cell biology concept: Determine whether the question focuses on cell structure, organelle function, transport, microscopy, division, or specialization.
  2. Connect structure and function: Endocytosis forms a vesicle from the membrane to bring substances into the cell.
  3. Check the answer: The correct answer is The cell membrane surrounds and brings material into the cell..

Endocytosis forms a vesicle from the membrane to bring substances into the cell.

7. QuestionMultiple choice

What happens during exocytosis?

Please select an answer first.

Correct answer: C

The correct answer is A vesicle fuses with the cell membrane and releases its contents outside..

  1. Identify the cell biology concept: Determine whether the question focuses on cell structure, organelle function, transport, microscopy, division, or specialization.
  2. Connect structure and function: Exocytosis moves materials out when a vesicle joins the cell membrane and empties its contents.
  3. Check the answer: The correct answer is A vesicle fuses with the cell membrane and releases its contents outside..

Exocytosis moves materials out when a vesicle joins the cell membrane and empties its contents.

8. QuestionMultiple choice

A cell is placed in a hypotonic solution. What is most likely to happen?

Please select an answer first.

Correct answer: D

The correct answer is Water moves into the cell..

  1. Identify the cell biology concept: Determine whether the question focuses on cell structure, organelle function, transport, microscopy, division, or specialization.
  2. Connect structure and function: A hypotonic solution has a lower solute concentration than the cell, so water tends to enter by osmosis.
  3. Check the answer: The correct answer is Water moves into the cell..

A hypotonic solution has a lower solute concentration than the cell, so water tends to enter by osmosis.

9. QuestionMultiple choice

What happens to water movement when a cell is in an isotonic solution?

Please select an answer first.

Correct answer: A

The correct answer is There is no net movement of water..

  1. Identify the cell biology concept: Determine whether the question focuses on cell structure, organelle function, transport, microscopy, division, or specialization.
  2. Connect structure and function: In an isotonic solution, water moves in both directions at equal rates, producing no net change.
  3. Check the answer: The correct answer is There is no net movement of water..

In an isotonic solution, water moves in both directions at equal rates, producing no net change.

10. QuestionMultiple choice

What is a concentration gradient?

Please select an answer first.

Correct answer: B

The correct answer is A difference in the concentration of a substance between two regions..

  1. Identify the cell biology concept: Determine whether the question focuses on cell structure, organelle function, transport, microscopy, division, or specialization.
  2. Connect structure and function: A concentration gradient is the difference that can drive diffusion or require energy to overcome during active transport.
  3. Check the answer: The correct answer is A difference in the concentration of a substance between two regions..

A concentration gradient is the difference that can drive diffusion or require energy to overcome during active transport.

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