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100+ Free Florida Biology EOC Practice Questions

Pass your Biology 1 End-of-Course (EOC) Assessment exam on the first try — instant access, no signup required.

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Key Facts: Florida Biology EOC Exam

49-55

Published Item Range

FDOE Science Test Design Summary

160 min

Administration Time

FDOE 2025-26 EOC Fact Sheet

395

Level 3 Begins

FDOE 2025-26 EOC Fact Sheet

40%

Largest Reporting Category

Organisms, Populations, and Ecosystems

The Florida Biology 1 EOC remains a current FDOE Science EOC assessment. The 2025-26 fact sheet lists Biology 1 among active Science and Social Studies EOCs, with a 160-minute computer-based adaptive session. The Science Test Design Summary assigns 35% of the test to Molecular and Cellular Biology, 25% to Classification, Heredity, and Evolution, and 40% to Organisms, Populations, and Ecosystems.

Sample Florida Biology EOC Practice Questions

Try these sample questions to test your Florida Biology EOC exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which statement is part of cell theory?
A.All cells contain chloroplasts.
B.All living things are made of one or more cells.
C.All cells have a nucleus surrounded by a membrane.
D.All living things use photosynthesis to obtain energy.
Explanation: Cell theory states that living things are made of cells, cells are the basic unit of structure and function, and new cells come from existing cells. Chloroplasts and nuclei are found only in certain types of cells.
2A scientist observes a cell with DNA floating in the cytoplasm and no membrane-bound organelles. Which type of cell is this most likely?
A.A plant cell
B.An animal cell
C.A prokaryotic cell
D.A fungal cell
Explanation: Prokaryotic cells lack a nucleus and membrane-bound organelles, so their DNA is located in the cytoplasm. Plant, animal, and fungal cells are eukaryotic and contain membrane-bound organelles.
3Which organelle is the main site of ATP production during aerobic cellular respiration?
A.Ribosome
B.Mitochondrion
C.Golgi apparatus
D.Nucleus
Explanation: Mitochondria carry out the later stages of aerobic cellular respiration and produce most of a cell's ATP. Ribosomes make proteins, the Golgi apparatus modifies and packages molecules, and the nucleus stores DNA.
4A cell has a cell wall, chloroplasts, and a large central vacuole. Which conclusion is best supported?
A.The cell is a plant cell.
B.The cell is an animal cell.
C.The cell is a virus.
D.The cell is a prokaryote.
Explanation: Plant cells typically have a cellulose cell wall, chloroplasts for photosynthesis, and a large central vacuole for storage and pressure support. Animal cells lack cell walls and chloroplasts.
5The cell membrane is described as selectively permeable. What does this mean?
A.It allows all substances to enter but no substances to leave.
B.It controls which substances move into and out of the cell.
C.It prevents water from crossing under all conditions.
D.It is made only of proteins that transport oxygen.
Explanation: A selectively permeable membrane permits some substances to cross more easily than others. This helps cells maintain homeostasis by regulating movement of water, ions, nutrients, and wastes.
6A red blood cell is placed in pure water and bursts. Which process best explains why water entered the cell?
A.Osmosis from higher water concentration outside the cell to lower water concentration inside the cell
B.Active transport of water using ATP against its concentration gradient
C.Diffusion of solute particles out of the cell through protein pumps
D.Endocytosis of water droplets by the cell membrane
Explanation: Osmosis is the diffusion of water across a selectively permeable membrane. In pure water, the outside solution is hypotonic, so water moves into the cell and can cause it to swell and burst.
7Which macromolecule is the main short-term energy source for most cells?
A.Carbohydrate
B.Nucleic acid
C.Protein
D.Lipid
Explanation: Carbohydrates such as glucose are commonly used for quick energy in cells. Lipids store long-term energy, proteins perform many structural and enzymatic roles, and nucleic acids store genetic information.
8Enzymes are proteins that speed up chemical reactions by
A.raising the activation energy.
B.lowering the activation energy.
C.being consumed as reactants.
D.changing the products into different elements.
Explanation: Enzymes are catalysts, so they lower the activation energy needed for a reaction to proceed. They are not used up during the reaction and do not change atoms into different elements.
9An enzyme works best at 37 degrees C. At 80 degrees C, the reaction rate drops sharply. What is the most likely explanation?
A.The enzyme has been denatured, changing the shape of its active site.
B.The enzyme has become a carbohydrate and can no longer bind substrates.
C.The substrate has turned into an enzyme and competes for products.
D.The reaction has stopped because activation energy increased to zero.
Explanation: High temperatures can denature proteins by changing their three-dimensional shape. If the active site changes, the substrate no longer fits well and the enzyme's activity decreases.
10Students test how pH affects an enzyme. Which setup best isolates pH as the independent variable?
A.Use different temperatures and different pH values for each trial.
B.Use the same enzyme and substrate amounts while changing only pH.
C.Use a different enzyme for every pH and keep the temperature constant.
D.Use no control group because enzymes always work the same way.
Explanation: A valid controlled experiment changes only the independent variable, which is pH in this case. Enzyme amount, substrate amount, temperature, and time should be held constant so changes in rate can be linked to pH.

About the Florida Biology EOC Exam

The Florida Biology 1 EOC is a statewide high school science assessment for students completing Biology 1 or equivalent courses. Current FDOE materials still use the official Biology 1 End-of-Course Assessment name and organize the blueprint around molecular and cellular biology, heredity and evolution, and organisms and ecosystems.

Assessment

FDOE publishes a 49-55 item range for Biology 1, including operational and field-test multiple-choice items.

Time Limit

160 minutes

Passing Score

Scale score 395 (Achievement Level 3)

Exam Fee

No separate student registration fee published by FDOE for the school-administered assessment (Florida Department of Education Bureau of K-12 Student Assessment)

Florida Biology EOC Exam Content Outline

35%

Molecular and Cellular Biology

Cell theory, prokaryotic and eukaryotic cells, organelles, membranes, transport, macromolecules, enzymes, DNA, mutations, mitosis, meiosis, photosynthesis, respiration, ATP, and water properties.

25%

Classification, Heredity, and Evolution

Evidence for evolution, common ancestry, classification, domains, cladograms, natural selection, genetic drift, gene flow, mutations, inheritance patterns, Punnett squares, and pedigrees.

40%

Organisms, Populations, and Ecosystems

Plant structures and functions, immune responses, human reproduction and development, population growth, limiting factors, succession, food webs, trophic energy transfer, matter cycles, biodiversity, invasive species, and human environmental impacts.

How to Pass the Florida Biology EOC Exam

What You Need to Know

  • Passing score: Scale score 395 (Achievement Level 3)
  • Assessment: FDOE publishes a 49-55 item range for Biology 1, including operational and field-test multiple-choice items.
  • Time limit: 160 minutes
  • Exam fee: No separate student registration fee published by FDOE for the school-administered assessment

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

Florida Biology EOC Study Tips from Top Performers

1Prioritize Organisms, Populations, and Ecosystems because it is the largest reporting category at 40% of the blueprint.
2Practice interpreting graphs, food webs, pedigrees, cladograms, and experimental setups rather than memorizing definitions only.
3Know how photosynthesis and cellular respiration connect through matter and energy transformations.
4Review meiosis, inheritance patterns, mutations, and natural selection together because heredity and evolution questions often combine these ideas.
5Use FDOE sample items to get comfortable with computer-based Biology 1 EOC item style and tools.

Frequently Asked Questions

Is the Florida Biology 1 EOC still current?

Yes. FDOE's 2025-26 Science and Social Studies EOC fact sheet lists Biology 1 as an active end-of-course assessment for students enrolled in Biology 1 or equivalent courses.

How many questions are on the Florida Biology 1 EOC?

FDOE's Science Test Design Summary gives a Biology 1 range of 49-55 items. The spring range includes about 8-10 field-test items that are not included in student scores.

How long is the Biology 1 EOC?

The assessment is administered in one 160-minute computer-based session with a short break after the first 80 minutes. Students who are not finished may continue up to the length of a typical school day.

What score is passing on the Florida Biology 1 EOC?

FDOE states that the lowest score in Achievement Level 3 is the passing score. For Biology 1, Level 3 begins at a scale score of 395.

What content is most emphasized?

The largest reporting category is Organisms, Populations, and Ecosystems at 40%, followed by Molecular and Cellular Biology at 35% and Classification, Heredity, and Evolution at 25%.