BIO 111 Final Questions and Answers with Verified Solutions | Latest
2026 Update
Q: Eukaryotic Chromosomes: Structure and Function
Answer:
Eukaryotic DNA is linear and wrapped
around histone proteins.
Structure:
Chromatin = DNA + proteins (loose form).
Chromosome = Condensed form before division.
Sister chromatids = Identical halves of a duplicated chromosome.
Joined at a centromere.
Function: Package DNA efficiently and ensure accurate distribution during cell
division.
Q: Phases of the Cell Cycle
Answer:
1. G■ phase (Gap 1): Cell grows, performs functions.
2. S phase (Synthesis): DNA is replicated.
3. G■ phase (Gap 2): Final preparations for division.
4. M phase (Mitosis + Cytokinesis): Cell divides.
,BIO 111 Final Questions and Answers with Verified Solutions | Latest
2026 Update
Q: Checkpoints: Ensure the cell only divides if conditions are right. Key
checkpoints: 1. G■ checkpoint: Is the cell ready to divide?
Answer:
2. G■ checkpoint: Was DNA copied correctly? 3. M checkpoint: Are chromosomes
properly attached to the spindle?
Q: M Phase
Answer:
Includes Mitosis (division of the nucleus) and Cytokinesis (division of cytoplasm).
Mitosis stages: Prophase, Metaphase, Anaphase, Telophase.
Q: Control of the Cell Cycle
Answer:
Controlled by internal and external signals:
Cyclins and cyclin-dependent kinases (Cdks) drive the cycle forward.
Tumor suppressor genes (e.g., p53) stop the cycle if DNA is damaged.
,BIO 111 Final Questions and Answers with Verified Solutions | Latest
2026 Update
Q: Growth factors can speed up or trigger division.
Answer:
When control fails → cancer (uncontrolled cell division).
Q: Germ Cells
Answer:
Reproductive cells
Haploid (n)
Form gametes: sperm or egg
Meiosis
DNA is passed to offspring
, BIO 111 Final Questions and Answers with Verified Solutions | Latest
2026 Update
Q: Somatic Cells
Answer:
Body Cells
Diploid (2n)
Growth, repair, and every day function
Mitosis
DNA is NOT passed on to offspring
Q: Meiosis: Features and Process
Answer:
Purpose: Reduce chromosome number by half and create
genetically unique gametes.
Happens in two rounds of division: Meiosis I and Meiosis II.
Key features:
Starts with 1 diploid cell → ends with 4 haploid cells
Increases genetic diversity through:
Crossing over (Prophase I)
Independent assortment (Metaphase I)
2026 Update
Q: Eukaryotic Chromosomes: Structure and Function
Answer:
Eukaryotic DNA is linear and wrapped
around histone proteins.
Structure:
Chromatin = DNA + proteins (loose form).
Chromosome = Condensed form before division.
Sister chromatids = Identical halves of a duplicated chromosome.
Joined at a centromere.
Function: Package DNA efficiently and ensure accurate distribution during cell
division.
Q: Phases of the Cell Cycle
Answer:
1. G■ phase (Gap 1): Cell grows, performs functions.
2. S phase (Synthesis): DNA is replicated.
3. G■ phase (Gap 2): Final preparations for division.
4. M phase (Mitosis + Cytokinesis): Cell divides.
,BIO 111 Final Questions and Answers with Verified Solutions | Latest
2026 Update
Q: Checkpoints: Ensure the cell only divides if conditions are right. Key
checkpoints: 1. G■ checkpoint: Is the cell ready to divide?
Answer:
2. G■ checkpoint: Was DNA copied correctly? 3. M checkpoint: Are chromosomes
properly attached to the spindle?
Q: M Phase
Answer:
Includes Mitosis (division of the nucleus) and Cytokinesis (division of cytoplasm).
Mitosis stages: Prophase, Metaphase, Anaphase, Telophase.
Q: Control of the Cell Cycle
Answer:
Controlled by internal and external signals:
Cyclins and cyclin-dependent kinases (Cdks) drive the cycle forward.
Tumor suppressor genes (e.g., p53) stop the cycle if DNA is damaged.
,BIO 111 Final Questions and Answers with Verified Solutions | Latest
2026 Update
Q: Growth factors can speed up or trigger division.
Answer:
When control fails → cancer (uncontrolled cell division).
Q: Germ Cells
Answer:
Reproductive cells
Haploid (n)
Form gametes: sperm or egg
Meiosis
DNA is passed to offspring
, BIO 111 Final Questions and Answers with Verified Solutions | Latest
2026 Update
Q: Somatic Cells
Answer:
Body Cells
Diploid (2n)
Growth, repair, and every day function
Mitosis
DNA is NOT passed on to offspring
Q: Meiosis: Features and Process
Answer:
Purpose: Reduce chromosome number by half and create
genetically unique gametes.
Happens in two rounds of division: Meiosis I and Meiosis II.
Key features:
Starts with 1 diploid cell → ends with 4 haploid cells
Increases genetic diversity through:
Crossing over (Prophase I)
Independent assortment (Metaphase I)
