Georgia Biology EOC 2026 Study Guide &
Practice Questions PDF | End-of-Course
Exam Review with Verified Answers
• This 200-question Georgia Biology EOC practice exam covers all major topics from
the EOC standards with verified answers and detailed EXPERT RATIONALE to
reinforce key concepts.
• Use this study guide to identify knowledge gaps, practice test-taking strategies,
and build confidence before exam day by reviewing questions and understanding
the reasoning behind correct answers.
1. Which of the following is the primary function of the mitochondria in a cell?
A) Storage of genetic material
B) Synthesis of proteins
C) Production of ATP through cellular respiration
D) Breakdown of large molecules
E) Regulation of water balance
✓ C) Production of ATP through cellular respiration
EXPERT RATIONALE: Mitochondria are the powerhouse of the cell, responsible for
converting glucose and other nutrients into ATP (adenosine triphosphate), the
primary energy molecule used by cells for all metabolic processes.
2. What is the main difference between prokaryotic and eukaryotic cells?
A) Prokaryotic cells are larger than eukaryotic cells
B) Eukaryotic cells have a membrane-bound nucleus; prokaryotic cells do not
C) Prokaryotic cells contain chloroplasts; eukaryotic cells do not
D) Eukaryotic cells have cell walls; prokaryotic cells do not
E) Prokaryotic cells have more organelles than eukaryotic cells
,✓ B) Eukaryotic cells have a membrane-bound nucleus; prokaryotic cells do
not
EXPERT RATIONALE: The presence of a true nucleus enclosed by a nuclear
membrane is the defining characteristic that distinguishes eukaryotic cells from
prokaryotic cells. This compartmentalization allows for more complex cellular
organization.
3. Which structure is responsible for the synthesis of proteins in a cell?
A) Golgi apparatus
B) Endoplasmic reticulum
C) Ribosome
D) Lysosome
E) Centriole
✓ C) Ribosome
EXPERT RATIONALE: Ribosomes are the cellular structures that read mRNA and
translate the genetic code into amino acid sequences, thus synthesizing proteins
according to the instructions provided by DNA.
4. What process allows a cell to take in large particles by surrounding them
with its cell membrane?
A) Diffusion
B) Osmosis
C) Active transport
D) Phagocytosis
E) Exocytosis
✓ D) Phagocytosis
,EXPERT RATIONALE: Phagocytosis is a form of endocytosis where the cell
membrane engulfs large particles or even whole cells, bringing them into the cell in
a membrane-bound vesicle for digestion or storage.
5. Which of the following best describes the fluid mosaic model of the cell
membrane?
A) The membrane is composed entirely of cholesterol molecules
B) The membrane is a rigid structure that does not allow any molecules to pass
through
C) The membrane is composed of a phospholipid bilayer with embedded proteins
that can move laterally
D) The membrane is composed of cellulose fibers arranged in layers
E) The membrane is a single layer of lipids with no proteins
✓ C) The membrane is composed of a phospholipid bilayer with embedded
proteins that can move laterally
EXPERT RATIONALE: The fluid mosaic model describes the cell membrane as
having a flexible structure with phospholipids forming a bilayer and proteins
embedded throughout that can move within the membrane, allowing for selective
permeability and cellular function.
6. During which phase of mitosis do chromosomes line up at the cell's
equator?
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
E) Cytokinesis
, ✓ B) Metaphase
EXPERT RATIONALE: During metaphase, replicated chromosomes align at the
metaphase plate (equator) of the cell, held in place by spindle fibers attached to
their centromeres, preparing for the separation in anaphase.
7. What is the primary role of meiosis in organisms?
A) To produce identical body cells for growth and repair
B) To produce four genetically unique haploid gametes for sexual reproduction
C) To duplicate organelles within a cell
D) To synthesize new proteins for cellular function
E) To break down old cell structures
✓ B) To produce four genetically unique haploid gametes for sexual
reproduction
EXPERT RATIONALE: Meiosis is a specialized form of cell division that reduces the
chromosome number by half and produces four non-identical sex cells (gametes),
which is essential for sexual reproduction and genetic diversity.
8. If an organism has a genotype of Aa for a particular trait, what is its
phenotype if A is dominant to a?
A) Recessive phenotype
B) Dominant phenotype
C) Codominant phenotype
D) Impossible to determine
E) Lethal phenotype
✓ B) Dominant phenotype
Practice Questions PDF | End-of-Course
Exam Review with Verified Answers
• This 200-question Georgia Biology EOC practice exam covers all major topics from
the EOC standards with verified answers and detailed EXPERT RATIONALE to
reinforce key concepts.
• Use this study guide to identify knowledge gaps, practice test-taking strategies,
and build confidence before exam day by reviewing questions and understanding
the reasoning behind correct answers.
1. Which of the following is the primary function of the mitochondria in a cell?
A) Storage of genetic material
B) Synthesis of proteins
C) Production of ATP through cellular respiration
D) Breakdown of large molecules
E) Regulation of water balance
✓ C) Production of ATP through cellular respiration
EXPERT RATIONALE: Mitochondria are the powerhouse of the cell, responsible for
converting glucose and other nutrients into ATP (adenosine triphosphate), the
primary energy molecule used by cells for all metabolic processes.
2. What is the main difference between prokaryotic and eukaryotic cells?
A) Prokaryotic cells are larger than eukaryotic cells
B) Eukaryotic cells have a membrane-bound nucleus; prokaryotic cells do not
C) Prokaryotic cells contain chloroplasts; eukaryotic cells do not
D) Eukaryotic cells have cell walls; prokaryotic cells do not
E) Prokaryotic cells have more organelles than eukaryotic cells
,✓ B) Eukaryotic cells have a membrane-bound nucleus; prokaryotic cells do
not
EXPERT RATIONALE: The presence of a true nucleus enclosed by a nuclear
membrane is the defining characteristic that distinguishes eukaryotic cells from
prokaryotic cells. This compartmentalization allows for more complex cellular
organization.
3. Which structure is responsible for the synthesis of proteins in a cell?
A) Golgi apparatus
B) Endoplasmic reticulum
C) Ribosome
D) Lysosome
E) Centriole
✓ C) Ribosome
EXPERT RATIONALE: Ribosomes are the cellular structures that read mRNA and
translate the genetic code into amino acid sequences, thus synthesizing proteins
according to the instructions provided by DNA.
4. What process allows a cell to take in large particles by surrounding them
with its cell membrane?
A) Diffusion
B) Osmosis
C) Active transport
D) Phagocytosis
E) Exocytosis
✓ D) Phagocytosis
,EXPERT RATIONALE: Phagocytosis is a form of endocytosis where the cell
membrane engulfs large particles or even whole cells, bringing them into the cell in
a membrane-bound vesicle for digestion or storage.
5. Which of the following best describes the fluid mosaic model of the cell
membrane?
A) The membrane is composed entirely of cholesterol molecules
B) The membrane is a rigid structure that does not allow any molecules to pass
through
C) The membrane is composed of a phospholipid bilayer with embedded proteins
that can move laterally
D) The membrane is composed of cellulose fibers arranged in layers
E) The membrane is a single layer of lipids with no proteins
✓ C) The membrane is composed of a phospholipid bilayer with embedded
proteins that can move laterally
EXPERT RATIONALE: The fluid mosaic model describes the cell membrane as
having a flexible structure with phospholipids forming a bilayer and proteins
embedded throughout that can move within the membrane, allowing for selective
permeability and cellular function.
6. During which phase of mitosis do chromosomes line up at the cell's
equator?
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
E) Cytokinesis
, ✓ B) Metaphase
EXPERT RATIONALE: During metaphase, replicated chromosomes align at the
metaphase plate (equator) of the cell, held in place by spindle fibers attached to
their centromeres, preparing for the separation in anaphase.
7. What is the primary role of meiosis in organisms?
A) To produce identical body cells for growth and repair
B) To produce four genetically unique haploid gametes for sexual reproduction
C) To duplicate organelles within a cell
D) To synthesize new proteins for cellular function
E) To break down old cell structures
✓ B) To produce four genetically unique haploid gametes for sexual
reproduction
EXPERT RATIONALE: Meiosis is a specialized form of cell division that reduces the
chromosome number by half and produces four non-identical sex cells (gametes),
which is essential for sexual reproduction and genetic diversity.
8. If an organism has a genotype of Aa for a particular trait, what is its
phenotype if A is dominant to a?
A) Recessive phenotype
B) Dominant phenotype
C) Codominant phenotype
D) Impossible to determine
E) Lethal phenotype
✓ B) Dominant phenotype
