Unlock your potential in Introductory Biology with the “2025 BIO 1124 Exam 3 (Introductory Biology: Molecules, Cells, and Physiology) New Latest Version with All 50 Multiple Choice Questions, Correct Answers and Rationales.” Specifically designed for students enrolled in BIO 1124—such as those at the University of Oklahoma—this cutting-edge test bank targets Exam 3, delving deep into the foundational pillars of molecules, cells, and physiology.
Freshly updated for the 2025 academic year, this resource delivers 50 meticulously crafted multiple-choice questions (MCQs) that reflect the most current syllabus and exam expectations for 2024-2025. Each question is paired with a verified correct answer and a comprehensive rationale, offering clear explanations to demystify topics like molecular bonding (e.g., polar vs. nonpolar), cellular processes (e.g., osmosis, glycolysis), and physiological systems (e.g., feedback loops in homeostasis). Whether you’re wrestling with the role of ATP in energy transfer or the structure of the endoplasmic reticulum, this test bank bridges the gap between rote memorization and true understanding.
Curated by biology educators with expertise in undergraduate curricula, this product ensures alignment with BIO 1124’s focus on cellular function, energy dynamics, and physiological regulation. It’s an ideal tool for self-study, classroom review, or last-minute cramming, providing a realistic preview of Exam 3’s format and difficulty. Available as an instant digital download, this test bank empowers you to practice efficiently, refine your test-taking skills, and secure the grade you deserve. Elevate your preparation and conquer BIO 1124 Exam 3 with confidence in 2025!
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2025 BIO 1124 Exam 3 (Introductory Biology: Molecules,
Cells, and Physiology) New Latest Version with All 50
Multiple choice questions, Correct Answers and Rationales
Question 1
What is the primary source of energy for ATP production in eukaryotic cells?
A) Glucose
B) Oxygen
C) Carbon dioxide
D) Light
Correct Answer: A) Glucose
Rationale: Glucose is the primary substrate broken down during cellular respiration (glycolysis,
Krebs cycle, and oxidative phosphorylation) to produce ATP. Oxygen acts as an electron
acceptor, not an energy source, while carbon dioxide is a byproduct, and light is relevant only in
photosynthesis.
Question 2
Which organelle is responsible for protein synthesis in a eukaryotic cell?
A) Mitochondria
B) Ribosome
C) Golgi apparatus
D) Lysosome
Correct Answer: B) Ribosome
Rationale: Ribosomes, either free in the cytoplasm or bound to the endoplasmic reticulum,
synthesize proteins by translating mRNA. Mitochondria produce ATP, the Golgi modifies
proteins, and lysosomes degrade waste.
Question 3
During which phase of mitosis do sister chromatids separate?
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
Correct Answer: C) Anaphase
Rationale: In anaphase, the spindle fibers pull sister chromatids apart to opposite poles of the
cell. Prophase involves chromosome condensation, metaphase aligns chromosomes, and
telophase reforms nuclei.
Question 4
What molecule carries amino acids to the ribosome during translation?
A) mRNA
B) tRNA
C) rRNA
D) DNA
Correct Answer: B) tRNA
Rationale: Transfer RNA (tRNA) brings specific amino acids to the ribosome, matching its
anticodon to the mRNA codon. mRNA provides the code, rRNA forms the ribosome, and DNA
remains in the nucleus.
Question 5
Which process directly requires oxygen in cellular respiration?
A) Glycolysis
B) Pyruvate oxidation
C) Krebs cycle
D) Electron transport chain
Correct Answer: D) Electron transport chain
Rationale: The electron transport chain uses oxygen as the final electron acceptor to form water,
driving ATP synthesis. Glycolysis, pyruvate oxidation, and the Krebs cycle do not directly
require oxygen (though they’re linked to aerobic respiration).
Cells, and Physiology) New Latest Version with All 50
Multiple choice questions, Correct Answers and Rationales
Question 1
What is the primary source of energy for ATP production in eukaryotic cells?
A) Glucose
B) Oxygen
C) Carbon dioxide
D) Light
Correct Answer: A) Glucose
Rationale: Glucose is the primary substrate broken down during cellular respiration (glycolysis,
Krebs cycle, and oxidative phosphorylation) to produce ATP. Oxygen acts as an electron
acceptor, not an energy source, while carbon dioxide is a byproduct, and light is relevant only in
photosynthesis.
Question 2
Which organelle is responsible for protein synthesis in a eukaryotic cell?
A) Mitochondria
B) Ribosome
C) Golgi apparatus
D) Lysosome
Correct Answer: B) Ribosome
Rationale: Ribosomes, either free in the cytoplasm or bound to the endoplasmic reticulum,
synthesize proteins by translating mRNA. Mitochondria produce ATP, the Golgi modifies
proteins, and lysosomes degrade waste.
Question 3
During which phase of mitosis do sister chromatids separate?
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
Correct Answer: C) Anaphase
Rationale: In anaphase, the spindle fibers pull sister chromatids apart to opposite poles of the
cell. Prophase involves chromosome condensation, metaphase aligns chromosomes, and
telophase reforms nuclei.
Question 4
What molecule carries amino acids to the ribosome during translation?
A) mRNA
B) tRNA
C) rRNA
D) DNA
Correct Answer: B) tRNA
Rationale: Transfer RNA (tRNA) brings specific amino acids to the ribosome, matching its
anticodon to the mRNA codon. mRNA provides the code, rRNA forms the ribosome, and DNA
remains in the nucleus.
Question 5
Which process directly requires oxygen in cellular respiration?
A) Glycolysis
B) Pyruvate oxidation
C) Krebs cycle
D) Electron transport chain
Correct Answer: D) Electron transport chain
Rationale: The electron transport chain uses oxygen as the final electron acceptor to form water,
driving ATP synthesis. Glycolysis, pyruvate oxidation, and the Krebs cycle do not directly
require oxygen (though they’re linked to aerobic respiration).
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