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100+ Free GA Milestones Biology EOC Practice Questions

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

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Which scientist is credited with developing the theory of evolution by natural selection, based in part on observations of finches in the Galapagos Islands?

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Key Facts: GA Milestones Biology EOC Exam

The Georgia Milestones EOC Biology Assessment is Georgia's free, standards-based end-of-course exam that measures high school mastery of the Georgia Standards of Excellence for Biology across five domains, Cells, Genetics, Organisms, Ecology, and Evolution, using multiple-choice items and counting as 20 percent of the final course grade.

Sample GA Milestones Biology EOC Practice Questions

Try these sample questions to test your GA Milestones 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 organelle is the primary site of ATP production through aerobic cellular respiration in a eukaryotic cell?
A.Mitochondrion
B.Ribosome
C.Golgi apparatus
D.Lysosome
Explanation: The mitochondrion carries out the citric acid cycle and oxidative phosphorylation, producing most of a cell's ATP. Its folded inner membrane (cristae) holds the electron transport chain. This is why mitochondria are called the powerhouse of the cell.
2A student observes a cell under a microscope and notes that it has no nucleus and no membrane-bound organelles. The cell is most likely a
A.prokaryotic cell
B.plant cell
C.animal cell
D.fungal cell
Explanation: Prokaryotic cells, such as bacteria, lack a nucleus and membrane-bound organelles; their DNA is in a nucleoid region. Eukaryotic cells (plant, animal, fungal) all contain a true nucleus and membrane-bound organelles. The absence of these features identifies the cell as prokaryotic.
3Which feature of the cell membrane best explains why it is described as a fluid mosaic?
A.Phospholipids and embedded proteins can move laterally within the bilayer
B.It is composed of a rigid layer of cellulose
C.It is made entirely of a single type of protein
D.It is completely impermeable to all molecules
Explanation: The fluid mosaic model describes the membrane as a flexible phospholipid bilayer with various proteins, cholesterol, and carbohydrates embedded in it. The components can drift laterally, giving the membrane its fluid quality, while the mix of molecules creates the mosaic pattern. This structure allows selective permeability.
4A plant cell is placed in pure distilled water. What will most likely happen to the cell?
A.Water will move into the cell, increasing turgor pressure against the cell wall
B.Water will rush out of the cell, causing it to shrivel
C.The cell will burst immediately because it has no wall
D.No net movement of water will occur
Explanation: Distilled water is hypotonic to the cell's cytoplasm, so water moves into the cell by osmosis. The rigid cell wall resists expansion, building turgor pressure that keeps the plant firm. The wall prevents the cell from bursting.
5Which process moves molecules across a cell membrane from a region of lower concentration to a region of higher concentration?
A.Active transport
B.Simple diffusion
C.Osmosis
D.Facilitated diffusion
Explanation: Active transport moves substances against their concentration gradient, from low to high concentration, and therefore requires energy from ATP. The sodium-potassium pump is a classic example. Passive processes only move substances down their gradient.
6Which organelle in plant cells captures light energy to produce glucose during photosynthesis?
A.Chloroplast
B.Mitochondrion
C.Vacuole
D.Nucleus
Explanation: Chloroplasts contain chlorophyll, the green pigment that absorbs light energy used to convert carbon dioxide and water into glucose. They are found in plant cells and some protists. Photosynthesis takes place in the thylakoid membranes and stroma of the chloroplast.
7Enzymes speed up biochemical reactions in cells primarily by
A.lowering the activation energy required for the reaction
B.increasing the temperature of the cell
C.adding extra energy to the reactants
D.permanently binding to and consuming the substrate
Explanation: Enzymes are biological catalysts that lower the activation energy needed for a reaction to proceed, allowing it to occur faster at body temperature. They bind substrates at their active site but are not consumed and can be reused. This makes cellular reactions efficient.
8Which class of biological macromolecule serves as the main source of quick energy and includes monosaccharides such as glucose?
A.Carbohydrates
B.Proteins
C.Lipids
D.Nucleic acids
Explanation: Carbohydrates are made of carbon, hydrogen, and oxygen and include sugars like glucose, which cells break down rapidly for energy. Their monomers are monosaccharides. Polysaccharides such as starch and glycogen store this energy.
9What are the monomers (building blocks) that link together to form proteins?
A.Amino acids
B.Nucleotides
C.Fatty acids
D.Monosaccharides
Explanation: Proteins are polymers of amino acids joined by peptide bonds. There are 20 different amino acids, and their sequence determines the protein's folding and function. The order is coded by genes in DNA.
10An enzyme stops functioning after the cell's environment becomes very acidic. The most likely explanation is that the enzyme has
A.been denatured, changing the shape of its active site
B.been converted into a different enzyme
C.permanently bonded to its product
D.increased its reaction rate
Explanation: Extreme pH disrupts the bonds that maintain an enzyme's three-dimensional shape, a process called denaturation. When the active site changes shape, the substrate no longer fits and the enzyme cannot catalyze the reaction. Each enzyme has an optimal pH and temperature range.

About the GA Milestones Biology EOC Exam

The Georgia Milestones End-of-Course (EOC) Biology Assessment is a state summative test that measures how well Georgia high school students have mastered the Georgia Standards of Excellence for Biology. As an EOC measure, it serves as the final exam for the Biology course and counts as 20 percent of a student's final course grade under State Board Rule. The assessment consists of 75 selected-response (multiple-choice) items, of which 55 contribute to the criterion-referenced score and achievement level. Content is organized into five domains: Cells, Genetics, Organisms, Ecology, and Evolution. It is primarily a computer-based test given in two timed sections, and questions are written across four Depth of Knowledge levels to assess both recall and higher-order reasoning. Results are reported in four achievement levels, and the test is free to students.

Questions

100 scored questions

Time Limit

Given in two sections of up to 70 minutes each, for a total estimated testing time of about 90 to 140 minutes; sections may be administered on the same day or across two consecutive days.

Passing Score

Results are reported in four achievement levels (Beginning, Developing, Proficient, and Distinguished Learner); Proficient Learner or higher indicates the student has met the Georgia Standards of Excellence for Biology.

Exam Fee

Free for students; the assessment is funded by the State of Georgia and administered through public school districts. (Georgia Department of Education (GaDOE), Assessment and Accountability Division)

GA Milestones Biology EOC Exam Content Outline

Approx. 18%

Cells

Cell structure and function, membrane transport, organelles, cell theory, prokaryotic versus eukaryotic cells, and cellular reproduction including mitosis and the cell cycle.

Approx. 25%

Genetics

DNA structure and replication, transcription and translation, Mendelian inheritance and Punnett squares, mutations, meiosis, and biotechnology such as genetic engineering.

Approx. 17%

Organisms

Body system organization and interactions, homeostasis and feedback mechanisms, plant structures, and the relationship among cells, tissues, organs, and organ systems.

Approx. 25%

Ecology

Energy flow and trophic levels, biogeochemical cycles, population dynamics and carrying capacity, symbiotic relationships, and human impacts on ecosystems.

Approx. 15%

Evolution

Natural selection and adaptation, evidence for evolution from fossils and anatomy and molecules, speciation, and the work of Darwin and modern evolutionary biology.

How to Pass the GA Milestones Biology EOC Exam

What You Need to Know

  • Passing score: Results are reported in four achievement levels (Beginning, Developing, Proficient, and Distinguished Learner); Proficient Learner or higher indicates the student has met the Georgia Standards of Excellence for Biology.
  • Exam length: 100 questions
  • Time limit: Given in two sections of up to 70 minutes each, for a total estimated testing time of about 90 to 140 minutes; sections may be administered on the same day or across two consecutive days.
  • Exam fee: Free for students; the assessment is funded by the State of Georgia and administered through public school districts.

Keys to Passing

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

GA Milestones Biology EOC Study Tips from Top Performers

1Review all five domains, but spend extra time on Genetics and Ecology, which each make up about a quarter of the test.
2Practice solving Punnett square problems, including monohybrid, dihybrid, codominance, and sex-linked crosses, since genetics is heavily weighted.
3Master core cell concepts such as organelle functions, membrane transport, osmosis and tonicity, and the difference between mitosis and meiosis.
4Learn how energy flows through ecosystems, including the roughly ten percent rule, trophic levels, food webs, and biogeochemical cycles like the carbon and nitrogen cycles.
5Understand the evidence for evolution, including fossils, homologous versus analogous structures, and DNA comparisons, plus how natural selection works.
6Use diagrams, data tables, and graphs to answer questions, since many items ask you to analyze information rather than simply recall facts.

Frequently Asked Questions

What is the Georgia Milestones EOC Biology Assessment?

It is Georgia's state end-of-course (EOC) summative assessment for high school Biology, designed to measure mastery of the Georgia Standards of Excellence for Biology. It is primarily a computer-based, multiple-choice test administered by the Georgia Department of Education as part of the Georgia Milestones Assessment System.

What topics are on the Georgia Milestones Biology EOC?

The test is organized into five content domains: Cells (cell structure, transport, and division), Genetics (DNA, inheritance, and biotechnology), Organisms (body systems and homeostasis), Ecology (energy flow, cycles, and ecosystems), and Evolution (natural selection and evidence for evolution).

How many questions are on the Biology EOC and what type are they?

The Biology EOC has 75 selected-response (multiple-choice) items, each with four answer choices. Of these, 55 items contribute to the student's criterion-referenced score and achievement level, while the rest are field-test or norm-referenced items that do not affect the achievement level.

How is the Georgia Milestones Biology EOC scored?

Scores are reported in four achievement levels: Beginning Learner, Developing Learner, Proficient Learner, and Distinguished Learner. A student at Proficient Learner or above has met the Georgia Standards of Excellence for Biology, and the EOC counts as 20 percent of the final course grade.

How long is the Georgia Milestones Biology EOC?

The test is given in two sections of up to 70 minutes each, for a total estimated testing time of about 90 to 140 minutes. The two sections may be administered on the same day or across two consecutive days, depending on the district's testing protocols.

Is the Georgia Milestones Biology EOC free?

Yes. The assessment is free to students because it is funded by the State of Georgia and administered through public school districts as a required part of the Georgia Milestones Assessment System.