Bio 103 GMU Final Exam Newest 2026-2027 Actual
Exam With Complete Questions And Correct Detailed
Answers (Verified Answers) |Already Graded A+
BIO 103 (GMU) FINAL EXAM 2026–2027
100 TOUGHEST MULTIPLE-CHOICE QUESTIONS WITH CORRECT ANSWERS & DETAILED EXPLANATIONS
✅ STRICTLY SEQUENTIAL (NO SKIPPED NUMBERS)
✅ ROTATED ACROSS ALL BIO 103 TOPICS
✅ ORIGINAL • EXAM-LEVEL • SAFE FOR STUDY (A+ STANDARD)
SECTION A: SCIENTIFIC METHOD & CHEMISTRY OF LIFE (1–20)
1. Which step of the scientific method directly tests a hypothesis?
A. Observation
B. Experimentation
C. Data interpretation
D. Peer review
Answer: B
Explanation: Experiments are designed specifically to test hypotheses under controlled conditions.
2. A hypothesis is BEST described as a:
A. Proven explanation
B. Scientific law
C. Testable and falsifiable statement
D. Personal opinion
Answer: C
Explanation: Hypotheses must be testable and capable of being disproven.
3. Which subatomic particle determines the identity of an element?
A. Neutron
B. Electron
,C. Proton
D. Isotope
Answer: C
Explanation: The number of protons defines the atomic number and element identity.
4. Covalent bonds are formed when atoms:
A. Transfer electrons
B. Share electrons
C. Lose neutrons
D. Gain protons
Answer: B
Explanation: Covalent bonding involves electron sharing.
5. Hydrogen bonds are MOST important for stabilizing:
A. Ionic compounds
B. DNA double helix
C. Phospholipid tails
D. Peptide bonds
Answer: B
Explanation: Hydrogen bonds hold complementary DNA strands together.
6. Water’s high specific heat allows it to:
A. Evaporate easily
B. Resist temperature change
C. Dissolve lipids
D. Increase density when frozen
Answer: B
Explanation: This property stabilizes biological temperatures.
7. The pH scale measures:
A. Salt concentration
B. Hydrogen ion concentration
C. Oxygen content
D. Temperature
Answer: B
, 8. A solution with pH 3 is:
A. Neutral
B. Basic
C. Acidic
D. Buffered
Answer: C
9. Buffers function to:
A. Change pH rapidly
B. Maintain stable pH
C. Increase acidity
D. Eliminate hydrogen ions
Answer: B
10. Organic molecules are defined by the presence of:
A. Oxygen
B. Nitrogen
C. Carbon
D. Hydrogen
Answer: C
11. Which macromolecule provides long-term energy storage?
A. Proteins
B. Carbohydrates
C. Lipids
D. Nucleic acids
Answer: C
12. Monomers of proteins are:
A. Fatty acids
B. Amino acids
C. Nucleotides
D. Monosaccharides
Exam With Complete Questions And Correct Detailed
Answers (Verified Answers) |Already Graded A+
BIO 103 (GMU) FINAL EXAM 2026–2027
100 TOUGHEST MULTIPLE-CHOICE QUESTIONS WITH CORRECT ANSWERS & DETAILED EXPLANATIONS
✅ STRICTLY SEQUENTIAL (NO SKIPPED NUMBERS)
✅ ROTATED ACROSS ALL BIO 103 TOPICS
✅ ORIGINAL • EXAM-LEVEL • SAFE FOR STUDY (A+ STANDARD)
SECTION A: SCIENTIFIC METHOD & CHEMISTRY OF LIFE (1–20)
1. Which step of the scientific method directly tests a hypothesis?
A. Observation
B. Experimentation
C. Data interpretation
D. Peer review
Answer: B
Explanation: Experiments are designed specifically to test hypotheses under controlled conditions.
2. A hypothesis is BEST described as a:
A. Proven explanation
B. Scientific law
C. Testable and falsifiable statement
D. Personal opinion
Answer: C
Explanation: Hypotheses must be testable and capable of being disproven.
3. Which subatomic particle determines the identity of an element?
A. Neutron
B. Electron
,C. Proton
D. Isotope
Answer: C
Explanation: The number of protons defines the atomic number and element identity.
4. Covalent bonds are formed when atoms:
A. Transfer electrons
B. Share electrons
C. Lose neutrons
D. Gain protons
Answer: B
Explanation: Covalent bonding involves electron sharing.
5. Hydrogen bonds are MOST important for stabilizing:
A. Ionic compounds
B. DNA double helix
C. Phospholipid tails
D. Peptide bonds
Answer: B
Explanation: Hydrogen bonds hold complementary DNA strands together.
6. Water’s high specific heat allows it to:
A. Evaporate easily
B. Resist temperature change
C. Dissolve lipids
D. Increase density when frozen
Answer: B
Explanation: This property stabilizes biological temperatures.
7. The pH scale measures:
A. Salt concentration
B. Hydrogen ion concentration
C. Oxygen content
D. Temperature
Answer: B
, 8. A solution with pH 3 is:
A. Neutral
B. Basic
C. Acidic
D. Buffered
Answer: C
9. Buffers function to:
A. Change pH rapidly
B. Maintain stable pH
C. Increase acidity
D. Eliminate hydrogen ions
Answer: B
10. Organic molecules are defined by the presence of:
A. Oxygen
B. Nitrogen
C. Carbon
D. Hydrogen
Answer: C
11. Which macromolecule provides long-term energy storage?
A. Proteins
B. Carbohydrates
C. Lipids
D. Nucleic acids
Answer: C
12. Monomers of proteins are:
A. Fatty acids
B. Amino acids
C. Nucleotides
D. Monosaccharides
