Georgia Milestones Biology EOC Exam Study Guide | 200
High-Yield Practice Questions & In-Depth Rationales
(2026 Master Pack)
Ace the Georgia Biology Milestone Exam with this elite 200-
question practice test and study guide package. Every high-
yield question features clean, accessible formatting with
italicized answers and detailed bold-italic rationales explaining
core state standards. This premium resource is optimized to
give high school students a competitive edge and provide
teachers with a comprehensive test-prep question bank.
Domain 1: Cells (Questions 1-20)
1. Which organelle is responsible for generating adenosine
triphosphate (ATP) through cellular respiration?
A) Chloroplast
B) Mitochondria
C) Lysosome
D) Golgi apparatus
Answer: B) Mitochondria
Rationale: The mitochondrion is known as the powerhouse
, of the cell because it converts biochemical energy from
nutrients into ATP. Chloroplasts are involved in
photosynthesis, lysosomes handle waste degradation,
and the Golgi apparatus modifies and packages proteins.
2. What is the primary structural component of the plant cell
wall?
A) Chitin
B) Cellulose
C) Peptidoglycan
D) Phospholipids
Answer: B) Cellulose
Rationale: Cellulose is a complex carbohydrate that
provides structural support and rigidity to plant cell
walls. Chitin is found in fungal cell walls, peptidoglycan is
found in bacterial cell walls, and phospholipids form the
plasma membrane matrix.
3. Which transport mechanism requires the expenditure of
cellular energy to move molecules against their concentration
gradient?
A) Facilitated diffusion
B) Simple diffusion
C) Active transport
, D) Osmosis
Answer: C) Active transport
Rationale: Active transport mechanisms, such as sodium-
potassium pumps, require ATP to move substances from
areas of lower concentration to areas of higher
concentration. Simple diffusion, facilitated diffusion, and
osmosis are passive processes that rely on the natural
kinetic energy of molecules.
4. During which phase of the cell cycle does DNA replication
occur?
A) G1 phase
B) S phase
C) G2 phase
D) M phase
Answer: B) S phase
Rationale: The S (Synthesis) phase of interphase is
specifically dedicated to replicating the cell's genetic
material so that each daughter cell receives an identical
copy. The G1 and G2 phases involve growth and
preparation, while the M phase represents actual cell
division.
, 5. What occurs during the anaphase stage of mitosis?
A) Chromosomes condense and become visible.
B) Chromosomes align at the equatorial plate.
C) Sister chromatids separate and move to opposite poles.
D) The nuclear envelope reforms around chromatin.
Answer: C) Sister chromatids separate and move to opposite
poles.
Rationale: Anaphase is characterized by the splitting of
centromeres and the pulling of sister chromatids apart
by spindle fibers. Chromosome condensation happens in
prophase, alignment happens in metaphase, and nuclear
reformation happens in telophase.
6. Which statement accurately describes a major difference
between prokaryotic and eukaryotic cells?
A) Prokaryotes have a membrane-bound nucleus, while
eukaryotes do not.
B) Eukaryotes possess membrane-bound organelles, whereas
prokaryotes lack them.
C) Prokaryotes contain linear DNA, while eukaryotes contain
circular DNA.
D) Eukaryotes are always unicellular, while prokaryotes are
always multicellular.
High-Yield Practice Questions & In-Depth Rationales
(2026 Master Pack)
Ace the Georgia Biology Milestone Exam with this elite 200-
question practice test and study guide package. Every high-
yield question features clean, accessible formatting with
italicized answers and detailed bold-italic rationales explaining
core state standards. This premium resource is optimized to
give high school students a competitive edge and provide
teachers with a comprehensive test-prep question bank.
Domain 1: Cells (Questions 1-20)
1. Which organelle is responsible for generating adenosine
triphosphate (ATP) through cellular respiration?
A) Chloroplast
B) Mitochondria
C) Lysosome
D) Golgi apparatus
Answer: B) Mitochondria
Rationale: The mitochondrion is known as the powerhouse
, of the cell because it converts biochemical energy from
nutrients into ATP. Chloroplasts are involved in
photosynthesis, lysosomes handle waste degradation,
and the Golgi apparatus modifies and packages proteins.
2. What is the primary structural component of the plant cell
wall?
A) Chitin
B) Cellulose
C) Peptidoglycan
D) Phospholipids
Answer: B) Cellulose
Rationale: Cellulose is a complex carbohydrate that
provides structural support and rigidity to plant cell
walls. Chitin is found in fungal cell walls, peptidoglycan is
found in bacterial cell walls, and phospholipids form the
plasma membrane matrix.
3. Which transport mechanism requires the expenditure of
cellular energy to move molecules against their concentration
gradient?
A) Facilitated diffusion
B) Simple diffusion
C) Active transport
, D) Osmosis
Answer: C) Active transport
Rationale: Active transport mechanisms, such as sodium-
potassium pumps, require ATP to move substances from
areas of lower concentration to areas of higher
concentration. Simple diffusion, facilitated diffusion, and
osmosis are passive processes that rely on the natural
kinetic energy of molecules.
4. During which phase of the cell cycle does DNA replication
occur?
A) G1 phase
B) S phase
C) G2 phase
D) M phase
Answer: B) S phase
Rationale: The S (Synthesis) phase of interphase is
specifically dedicated to replicating the cell's genetic
material so that each daughter cell receives an identical
copy. The G1 and G2 phases involve growth and
preparation, while the M phase represents actual cell
division.
, 5. What occurs during the anaphase stage of mitosis?
A) Chromosomes condense and become visible.
B) Chromosomes align at the equatorial plate.
C) Sister chromatids separate and move to opposite poles.
D) The nuclear envelope reforms around chromatin.
Answer: C) Sister chromatids separate and move to opposite
poles.
Rationale: Anaphase is characterized by the splitting of
centromeres and the pulling of sister chromatids apart
by spindle fibers. Chromosome condensation happens in
prophase, alignment happens in metaphase, and nuclear
reformation happens in telophase.
6. Which statement accurately describes a major difference
between prokaryotic and eukaryotic cells?
A) Prokaryotes have a membrane-bound nucleus, while
eukaryotes do not.
B) Eukaryotes possess membrane-bound organelles, whereas
prokaryotes lack them.
C) Prokaryotes contain linear DNA, while eukaryotes contain
circular DNA.
D) Eukaryotes are always unicellular, while prokaryotes are
always multicellular.
