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BIOS 255 FINAL EXAM 4 (Latest Update 2026 / 2027) Anatomy and Physiology IV with Lab | Questions & Answers | 100% Correct | Grade A – Chamberlain

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BIOS 255 FINAL EXAM 4 (Latest Update 2026 / 2027) Anatomy and Physiology IV with Lab | Questions & Answers | 100% Correct | Grade A – Chamberlain

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BIOS 255 FINAL EXAM 4 (Latest Update
) Anatomy and Physiology IV
with Lab | Questions & Answers | 100%
Correct | Grade A – Chamberlain

1. The cell theory states that:
r. r. r. r.




A. All cells arise from pre-existing cells
r. r. r. r. r. r.




B. Cells are only in animals
r. r. r. r. r.




C. Cells do not divide
r. r. r. r.




D. Cells store energy only
r. r. r. r.




Correct Answer: A r. r.




Rationale: Cell theory states all living organisms are made of cells
r. r. r. r. r. r. r. r. r. r.




and new cells come from existing cells.
r. r. r. r. r. r. r.




2. The fluid mosaic model describes:
r. r. r. r. r.




A. Plasma membrane structure
r. r. r.




B. Nuclear membrane only
r. r. r.




C. Cell wall structure
r. r. r.




D. Mitochondria
r.




Correct Answer: A r. r.




Rationale: Membrane is a fluid phospholipid bilayer with proteins
r. r. r. r. r. r. r. r.




embedded.
r.




3. Which organelle produces ATP?
r. r. r. r.

,A. Mitochondria
r.




B. Ribosome
r.




C. Nucleus
r.




D. Golgi apparatus
r. r.




Correct Answer: Ar. r.




Rationale: Mitochondria are the powerhouse of the cell.
r. r. r. r. r. r. r.




4. Ribosomes function in:
r. r. r.




A. Protein synthesis
r. r.




B. ATP production
r. r.




C. Lipid storage
r. r.




D. DNA replication
r. r.




Correct Answer: Ar. r.




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




5. Smooth ER is involved in:
r. r. r. r. r.




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




B. Protein synthesis
r. r.




C. DNA replication
r. r.




D. ATP production
r. r.




Correct Answer: Ar. r.




Rationale: Lacks ribosomes, responsible for lipid metabolism.
r. r. r. r. r. r.




6. Rough ER is involved in:
r. r. r. r. r.

,A. Protein synthesis
r. r.




B. Lipid synthesis
r. r.




C. ATP production
r. r.




D. DNA replication
r. r.




Correct Answer: A r. r.




Rationale: Studded with ribosomes for secretory and membrane
r. r. r. r. r. r. r.




protein synthesis.
r. r.




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




Correct Answer: A r. r.




Rationale: Processes proteins and lipids for transport.
r. r. r. r. 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: Break down macromolecules and cell debris.
r. r. r. r. r. r.




9. Peroxisomes function 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: Neutralize reactive oxygen species and detoxify alcohol.
r. r. r. r. r. r. r.




10. The nucleus contains:
r. r. r.




A. DNA
r.




B. Ribosomes
r.




C. Lipids
r.




D. ATP only
r. r.




Correct Answer: A r. r.




Rationale: Stores genetic material and coordinates cellular
r. r. r. r. r. r.




activities.
r.




11. Mitochondria have:
r. r.




A. Double membrane
r. r.




B. Single membrane
r. r.




C. No membrane
r. r.




D. Triple membrane
r. r.




Correct Answer: A r. r.




Rationale: Outer and inner membranes with cristae for ATP
r. r. r. r. r. r. r. r.




synthesis.
r.




12. Chloroplasts are found in:
r. r. r. r.

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