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Biology Practice Tests

These Grade 9 Biology practice tests introduce the study of life through questions about life processes, cells, organelles, biomolecules, enzymes, photosynthesis, cellular respiration, homeostasis, adaptation, and scientific investigation.

Skills covered

  • Recognizing characteristics of life, levels of organization, homeostasis, metabolism, reproduction, and adaptation
  • Identifying cell structures and explaining the functions of the nucleus, membrane, mitochondria, chloroplasts, ribosomes, and other organelles
  • Understanding carbohydrates, proteins, lipids, nucleic acids, enzymes, water, pH, and biological reactions
  • Connecting photosynthesis, cellular respiration, ATP, fermentation, matter, and energy in living systems
  • Analyzing hypotheses, variables, controls, repeated trials, models, graphs, conclusions, and scientific communication

How to use these practice tests

Identify the level of organization or process, connect structures to functions, track matter and energy, and use evidence from experiments or graphs. Review each explanation to strengthen biology vocabulary and scientific reasoning.

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

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Grade 9 Biology Practice Tests

Practice Grade 9 Science questions about characteristics of life, cells, organelles, biomolecules, enzymes, photosynthesis, cellular respiration, homeostasis, and scientific investigation.

Choose the best answer. Identify the biological system or process, apply the relevant principle, and use evidence when interpreting an experiment or model.

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

Which structure controls many activities of a eukaryotic cell?

Please select an answer first.

Correct answer: A

The correct answer is Nucleus..

  1. Identify the biology concept: Determine whether the question asks about life processes, cells, matter, energy, regulation, or scientific reasoning.
  2. Apply the biological principle: The nucleus contains genetic material and helps direct many cell activities.
  3. Check the answer: The correct answer is Nucleus..

The nucleus contains genetic material and helps direct many cell activities.

2. QuestionMultiple choice

What is the main function of the cell membrane?

Please select an answer first.

Correct answer: B

The correct answer is To regulate what enters and leaves the cell..

  1. Identify the biology concept: Determine whether the question asks about life processes, cells, matter, energy, regulation, or scientific reasoning.
  2. Apply the biological principle: The selectively permeable cell membrane controls movement of substances into and out of the cell.
  3. Check the answer: The correct answer is To regulate what enters and leaves the cell..

The selectively permeable cell membrane controls movement of substances into and out of the cell.

3. QuestionMultiple choice

Which organelle is the primary site of cellular respiration?

Please select an answer first.

Correct answer: C

The correct answer is Mitochondrion..

  1. Identify the biology concept: Determine whether the question asks about life processes, cells, matter, energy, regulation, or scientific reasoning.
  2. Apply the biological principle: Mitochondria release usable energy from food molecules through cellular respiration.
  3. Check the answer: The correct answer is Mitochondrion..

Mitochondria release usable energy from food molecules through cellular respiration.

4. QuestionMultiple choice

Which organelle captures light energy in plant cells?

Please select an answer first.

Correct answer: D

The correct answer is Chloroplast..

  1. Identify the biology concept: Determine whether the question asks about life processes, cells, matter, energy, regulation, or scientific reasoning.
  2. Apply the biological principle: Chloroplasts contain pigments and structures that capture light for photosynthesis.
  3. Check the answer: The correct answer is Chloroplast..

Chloroplasts contain pigments and structures that capture light for photosynthesis.

5. QuestionMultiple choice

What is the function of ribosomes?

Please select an answer first.

Correct answer: A

The correct answer is They assemble proteins..

  1. Identify the biology concept: Determine whether the question asks about life processes, cells, matter, energy, regulation, or scientific reasoning.
  2. Apply the biological principle: Ribosomes join amino acids to build proteins according to genetic instructions.
  3. Check the answer: The correct answer is They assemble proteins..

Ribosomes join amino acids to build proteins according to genetic instructions.

6. QuestionMultiple choice

Which statement describes prokaryotic cells?

Please select an answer first.

Correct answer: B

The correct answer is They lack a nucleus enclosed by a membrane..

  1. Identify the biology concept: Determine whether the question asks about life processes, cells, matter, energy, regulation, or scientific reasoning.
  2. Apply the biological principle: Prokaryotic cells, such as bacteria, have genetic material that is not enclosed in a membrane-bound nucleus.
  3. Check the answer: The correct answer is They lack a nucleus enclosed by a membrane..

Prokaryotic cells, such as bacteria, have genetic material that is not enclosed in a membrane-bound nucleus.

7. QuestionMultiple choice

What is the role of the cell wall in plants?

Please select an answer first.

Correct answer: C

The correct answer is It provides support and helps maintain cell shape..

  1. Identify the biology concept: Determine whether the question asks about life processes, cells, matter, energy, regulation, or scientific reasoning.
  2. Apply the biological principle: The rigid plant cell wall supports and protects the cell.
  3. Check the answer: The correct answer is It provides support and helps maintain cell shape..

The rigid plant cell wall supports and protects the cell.

8. QuestionMultiple choice

What is cytoplasm?

Please select an answer first.

Correct answer: D

The correct answer is The fluid-like material inside the cell where many reactions occur..

  1. Identify the biology concept: Determine whether the question asks about life processes, cells, matter, energy, regulation, or scientific reasoning.
  2. Apply the biological principle: Cytoplasm fills the cell and provides the environment for many cellular processes.
  3. Check the answer: The correct answer is The fluid-like material inside the cell where many reactions occur..

Cytoplasm fills the cell and provides the environment for many cellular processes.

9. QuestionMultiple choice

What is the function of the Golgi apparatus?

Please select an answer first.

Correct answer: A

The correct answer is It modifies, sorts, and packages certain cell products..

  1. Identify the biology concept: Determine whether the question asks about life processes, cells, matter, energy, regulation, or scientific reasoning.
  2. Apply the biological principle: The Golgi apparatus processes and packages proteins and other materials for transport.
  3. Check the answer: The correct answer is It modifies, sorts, and packages certain cell products..

The Golgi apparatus processes and packages proteins and other materials for transport.

10. QuestionMultiple choice

Which structure is found in both plant and animal cells?

Please select an answer first.

Correct answer: B

The correct answer is Cell membrane..

  1. Identify the biology concept: Determine whether the question asks about life processes, cells, matter, energy, regulation, or scientific reasoning.
  2. Apply the biological principle: Both plant and animal cells have cell membranes, while the other choices are characteristic of plant cells.
  3. Check the answer: The correct answer is Cell membrane..

Both plant and animal cells have cell membranes, while the other choices are characteristic of plant cells.

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