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BIOS 255 FINAL EXAM (Latest Update 2025 / 2026) Anatomy and Physiology IV with Lab | Questions & Answers | 100% Correct | Grade A – Chamberlain

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BIOS 255 FINAL EXAM (Latest Update 2025 / 2026) Anatomy and Physiology IV with Lab | Questions & Answers | 100% Correct | Grade A – Chamberlain

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BIOS 255 FINAL EXAM (Latest Update
) Anatomy and Physiology IV
with Lab | Questions & Answers | 100%
Correct | Grade A – Chamberlain

1. The basic unit of life is:
r. r. r. r. r.




A. Atom
r.




B. Molecule
r.




C. Cell
r.




D. Tissue r.




Correct Answer: C r. r.




Rationale: The cell is the fundamental structural and functional
r. r. r. r. r. r. r. r.




unit of all living organisms.
r. r. r. r. r.




2. The plasma membrane is primarily composed of:
r. r. r. r. r. r. r.




A. DNA and RNA
r. r. r.




B. Phospholipids and proteins
r. r. r.




C. Carbohydrates only
r. r.




D. Lipids only
r. r.




Correct Answer: B r. r.




Rationale: The phospholipid bilayer with embedded proteins forms
r. r. r. r. r. r. r.




the semi-permeable membrane.
r. r. r.




3. Which organelle is responsible for protein synthesis?
r. r. r. r. r. r. r.

,A. Mitochondria
r.




B. Ribosome
r.




C. Nucleus
r.




D. Golgi apparatus
r. r.




Correct Answer: B r. r.




Rationale: Ribosomes translate mRNA into polypeptides for protein
r. r. r. r. r. r. r.




production.
r.




4. Mitochondria are known as the:
r. r. r. r. r.




A. Cell wall
r. r.




B. Ribosome
r.




C. Powerhouse of the cell
r. r. r. r.




D. Lysosome
r.




Correct Answer: C r. r.




Rationale: Mitochondria generate ATP through oxidative
r. r. r. r. r.




phosphorylation.
r.




5. The smooth endoplasmic reticulum functions in:
r. r. r. r. r. r.




A. Lipid synthesis and detoxification
r. r. r. r.




B. Protein synthesis
r. r.




C. ATP production
r. r.




D. DNA replication
r. r.




Correct Answer: A r. r.




Rationale: Smooth ER lacks ribosomes and is involved in lipid
r. r. r. r. r. r. r. r. r.




metabolism and detoxification.
r. r. r.

,6. Rough ER is associated with:
r. r. r. r. r.




A. Protein synthesis
r. r.




B. Lipid synthesis
r. r.




C. DNA storage
r. r.




D. ATP generation
r. r.




Correct Answer: A r. r.




Rationale: Ribosomes attached to rough ER synthesize secretory
r. r. r. r. r. r. r.




and membrane proteins.
r. r. r.




7. The Golgi apparatus functions to:
r. r. r. r. r.




A. Modify, sort, and package proteins
r. r. r. r. r.




B. Produce ATP
r. r.




C. Synthesize DNA
r. r.




D. Store lipids
r. r.




Correct Answer: A r. r.




Rationale: Proteins from ER are processed, packaged, and shipped
r. r. r. r. r. r. r. r.




to destinations.
r. r.




8. Lysosomes contain:
r. r.




A. Digestive enzymes
r. r.




B. Ribosomes
r.




C. DNAr.




D. Lipids r.




Correct Answer: A r. r.

, Rationale: Lysosomes digest cellular waste, macromolecules, and
r. r. r. r. r. r.




pathogens.
r.




9. Peroxisomes help to:
r. r. r.




A. Detoxify harmful substances
r. r. r.




B. Produce ATP
r. r.




C. Synthesize proteins
r. r.




D. Store water
r. r.




Correct Answer: A r. r.




Rationale: Peroxisomes neutralize reactive oxygen species and
r. r. r. r. r. r.




detoxify chemicals.
r. r.




10. The nucleus stores:
r. r. r.




A. DNAr.




B. RNA only
r. r.




C. Proteins only
r. r.




D. Lipids only
r. r.




Correct Answer: A r. r.




Rationale: DNA carries genetic instructions and controls cellular
r. r. r. r. r. r. r.




activities.
r.




11. Chloroplasts are found in:
r. r. r. r.




A. Plant cells
r. r.




B. Animal cells
r. r.




C. Bacteria
r.

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