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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

Which organelle contains most of a eukaryotic cell's DNA and helps direct cell activities?

Please select an answer first.

Correct answer: A

The correct answer is Nucleus..

  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: The nucleus stores most genetic material and helps regulate gene expression and cell activities.
  3. Check the answer: The correct answer is Nucleus..

The nucleus stores most genetic material and helps regulate gene expression and cell activities.

2. QuestionMultiple choice

What is the primary function of mitochondria?

Please select an answer first.

Correct answer: B

The correct answer is Producing much of the cell's ATP through cellular respiration..

  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: Mitochondria transfer energy from food molecules into ATP during cellular respiration.
  3. Check the answer: The correct answer is Producing much of the cell's ATP through cellular respiration..

Mitochondria transfer energy from food molecules into ATP during cellular respiration.

3. QuestionMultiple choice

Which organelle captures light energy for photosynthesis in plant cells?

Please select an answer first.

Correct answer: C

The correct answer is Chloroplast..

  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: Chloroplasts contain chlorophyll and internal membranes that capture light energy for photosynthesis.
  3. Check the answer: The correct answer is Chloroplast..

Chloroplasts contain chlorophyll and internal membranes that capture light energy for photosynthesis.

4. QuestionMultiple choice

What do ribosomes do?

Please select an answer first.

Correct answer: D

The correct answer is They assemble proteins from amino acids..

  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: Ribosomes read genetic instructions and join amino acids to build proteins.
  3. Check the answer: The correct answer is They assemble proteins from amino acids..

Ribosomes read genetic instructions and join amino acids to build proteins.

5. QuestionMultiple choice

Which organelle modifies, sorts, and packages proteins for transport?

Please select an answer first.

Correct answer: A

The correct answer is Golgi apparatus..

  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: The Golgi apparatus processes cell products and packages them into vesicles for delivery.
  3. Check the answer: The correct answer is Golgi apparatus..

The Golgi apparatus processes cell products and packages them into vesicles for delivery.

6. QuestionMultiple choice

What is a major function of lysosomes?

Please select an answer first.

Correct answer: B

The correct answer is Digesting worn-out cell parts and certain materials..

  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: Lysosomes contain digestive enzymes that break down materials and recycle cell components.
  3. Check the answer: The correct answer is Digesting worn-out cell parts and certain materials..

Lysosomes contain digestive enzymes that break down materials and recycle cell components.

7. QuestionMultiple choice

What is the main role of a plant cell's large central vacuole?

Please select an answer first.

Correct answer: C

The correct answer is Storing water and helping maintain internal pressure..

  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: The central vacuole stores water and dissolved substances and helps maintain turgor pressure in plant cells.
  3. Check the answer: The correct answer is Storing water and helping maintain internal pressure..

The central vacuole stores water and dissolved substances and helps maintain turgor pressure in plant cells.

8. QuestionMultiple choice

What is the function of a plant cell wall?

Please select an answer first.

Correct answer: D

The correct answer is Providing support and helping maintain cell shape..

  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: The rigid cell wall supports and protects plant cells outside the cell membrane.
  3. Check the answer: The correct answer is Providing support and helping maintain cell shape..

The rigid cell wall supports and protects plant cells outside the cell membrane.

9. QuestionMultiple choice

What does the cytoskeleton help a cell do?

Please select an answer first.

Correct answer: A

The correct answer is Maintain shape and move materials or structures inside 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: The cytoskeleton is a network of protein fibers that supports cell shape and assists movement within the cell.
  3. Check the answer: The correct answer is Maintain shape and move materials or structures inside the cell..

The cytoskeleton is a network of protein fibers that supports cell shape and assists movement within the cell.

10. QuestionMultiple choice

What is a key function of the rough endoplasmic reticulum?

Please select an answer first.

Correct answer: B

The correct answer is Helping make and transport proteins that are destined for membranes or secretion..

  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: Ribosomes attached to rough ER make proteins that enter the ER for processing and transport.
  3. Check the answer: The correct answer is Helping make and transport proteins that are destined for membranes or secretion..

Ribosomes attached to rough ER make proteins that enter the ER for processing and transport.

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