1|Page
ASU BIO 181 FINAL EXAM 2026 BANK GENERAL BIOLOGY I: COMPLETE PRACTICE
QUESTIONS AND ANSWERS FOR ARIZONA STATE UNIVERSITY STUDENTS, EXAM
PREPARATION, AND BIOLOGY REVIEW GUIDE
1. Which property of water most directly allows it to stabilize temperatures in living
organisms and aquatic environments through high specific heat capacity?
A. Ionic bonding between molecules
B. Covalent bonds holding hydrogen and oxygen together
C. Hydrogen bonding between adjacent water molecules
D. Dispersion forces within liquid water
2. When ribosomes translate mRNA into proteins, which cellular process ensures that tRNAs
deliver the correct amino acids according to the codon sequence?
A. Ribosomal recycling
B. Anticodon-codon base pairing
C. DNA replication fidelity
D. Peptide bond hydrolysis
3. During cellular respiration, most ATP is generated during which stage, where a proton
gradient drives ATP synthase activity across the inner mitochondrial membrane?
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A. Glycolysis
B. Krebs cycle
C. Electron transport chain and oxidative phosphorylation
D. Fermentation
4. In photosynthesis, why is the Calvin cycle dependent on the light-dependent reactions
occurring within the thylakoid membranes of chloroplasts?
A. Calvin cycle requires NADPH and ATP produced during light reactions
B. Calvin cycle needs chlorophyll pigments recharged by sunlight
C. Calvin cycle depends directly on oxygen release
D. Calvin cycle is powered only by glucose hydrolysis
5. Which evolutionary mechanism most directly explains an increase in allele frequency for
traits that improve reproductive success within a specific population environment?
A. Gene drift
B. Mutation accumulation
C. Natural selection
D. Random mating
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6. When comparing prokaryotic and eukaryotic cells, which feature uniquely distinguishes
eukaryotes in terms of internal structural organization and compartmentalization?
A. Presence of ribosomes in cytoplasm
B. Membrane-bound organelles including nucleus
C. Plasma membrane surrounding the cell
D. Circular DNA molecules
7. Which principle of genetics was most clearly demonstrated by Mendel’s dihybrid crosses,
showing that alleles for different traits segregate independently?
A. Law of segregation
B. Law of independent assortment
C. Principle of dominance
D. Codominance
8. In molecular biology, what is the direct role of RNA polymerase during transcription of a
DNA gene sequence?
A. Unwinds and separates DNA double helix
B. Links amino acids into polypeptides
C. Catalyzes formation of complementary RNA transcript
D. Proofreads replicated DNA strands
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9. Which ecological concept explains how two species cannot stably occupy the exact same
niche in a habitat due to competition for identical resources?
A. Competitive exclusion principle
B. Logistic growth curve
C. Density-independent regulation
D. Resource partitioning
10. Why are viruses often not considered living organisms under standard biological
definitions?
A. They lack ribosomes and cannot perform independent metabolism
B. They contain nucleic acids
C. They can evolve and mutate
D. They can infect host organisms
11. Which specific bonds stabilize the secondary structure of proteins, forming alpha helices
and beta sheets within polypeptide chains?
A. Ionic bonds between R groups
B. Hydrogen bonds between peptide backbones
ASU BIO 181 FINAL EXAM 2026 BANK GENERAL BIOLOGY I: COMPLETE PRACTICE
QUESTIONS AND ANSWERS FOR ARIZONA STATE UNIVERSITY STUDENTS, EXAM
PREPARATION, AND BIOLOGY REVIEW GUIDE
1. Which property of water most directly allows it to stabilize temperatures in living
organisms and aquatic environments through high specific heat capacity?
A. Ionic bonding between molecules
B. Covalent bonds holding hydrogen and oxygen together
C. Hydrogen bonding between adjacent water molecules
D. Dispersion forces within liquid water
2. When ribosomes translate mRNA into proteins, which cellular process ensures that tRNAs
deliver the correct amino acids according to the codon sequence?
A. Ribosomal recycling
B. Anticodon-codon base pairing
C. DNA replication fidelity
D. Peptide bond hydrolysis
3. During cellular respiration, most ATP is generated during which stage, where a proton
gradient drives ATP synthase activity across the inner mitochondrial membrane?
,2|Page
A. Glycolysis
B. Krebs cycle
C. Electron transport chain and oxidative phosphorylation
D. Fermentation
4. In photosynthesis, why is the Calvin cycle dependent on the light-dependent reactions
occurring within the thylakoid membranes of chloroplasts?
A. Calvin cycle requires NADPH and ATP produced during light reactions
B. Calvin cycle needs chlorophyll pigments recharged by sunlight
C. Calvin cycle depends directly on oxygen release
D. Calvin cycle is powered only by glucose hydrolysis
5. Which evolutionary mechanism most directly explains an increase in allele frequency for
traits that improve reproductive success within a specific population environment?
A. Gene drift
B. Mutation accumulation
C. Natural selection
D. Random mating
,3|Page
6. When comparing prokaryotic and eukaryotic cells, which feature uniquely distinguishes
eukaryotes in terms of internal structural organization and compartmentalization?
A. Presence of ribosomes in cytoplasm
B. Membrane-bound organelles including nucleus
C. Plasma membrane surrounding the cell
D. Circular DNA molecules
7. Which principle of genetics was most clearly demonstrated by Mendel’s dihybrid crosses,
showing that alleles for different traits segregate independently?
A. Law of segregation
B. Law of independent assortment
C. Principle of dominance
D. Codominance
8. In molecular biology, what is the direct role of RNA polymerase during transcription of a
DNA gene sequence?
A. Unwinds and separates DNA double helix
B. Links amino acids into polypeptides
C. Catalyzes formation of complementary RNA transcript
D. Proofreads replicated DNA strands
, 4|Page
9. Which ecological concept explains how two species cannot stably occupy the exact same
niche in a habitat due to competition for identical resources?
A. Competitive exclusion principle
B. Logistic growth curve
C. Density-independent regulation
D. Resource partitioning
10. Why are viruses often not considered living organisms under standard biological
definitions?
A. They lack ribosomes and cannot perform independent metabolism
B. They contain nucleic acids
C. They can evolve and mutate
D. They can infect host organisms
11. Which specific bonds stabilize the secondary structure of proteins, forming alpha helices
and beta sheets within polypeptide chains?
A. Ionic bonds between R groups
B. Hydrogen bonds between peptide backbones
