BIOD 101 FINAL EXAM BIOD 101 ESSENTIAL BIOLOGY I PRACTICE
FINAL QUESTIONS WITH ANSWERS AND EXPLANATIONS
1. Which statement best describes scientific method and experimental design?
A. the number of protons determines the identity of an element
B. a testable, falsifiable hypothesis links an observation to a proposed explanation
C. water is polar and forms hydrogen bonds with other polar molecules
D. carbohydrates commonly provide energy and structural roles
Correct Answer: B. a testable, falsifiable hypothesis links an observation to a proposed explanation
Rationale: The correct answer is that a testable, falsifiable hypothesis links an observation to a proposed
explanation. That statement accurately reflects the underlying biology of scientific method and experimental
design; the other choices describe different processes or contain incorrect relationships.
2. Which statement best describes atomic structure and chemical bonding?
A. water is polar and forms hydrogen bonds with other polar molecules
B. carbohydrates commonly provide energy and structural roles
C. a testable, falsifiable hypothesis links an observation to a proposed explanation
D. the number of protons determines the identity of an element
Correct Answer: D. the number of protons determines the identity of an element
Rationale: The correct answer is that the number of protons determines the identity of an element. That statement
accurately reflects the underlying biology of atomic structure and chemical bonding; the other choices describe
different processes or contain incorrect relationships.
3. Which statement best describes water, pH, acids, bases, and buffers?
A. water is polar and forms hydrogen bonds with other polar molecules
B. carbohydrates commonly provide energy and structural roles
C. a testable, falsifiable hypothesis links an observation to a proposed explanation
D. the number of protons determines the identity of an element
Correct Answer: A. water is polar and forms hydrogen bonds with other polar molecules
Rationale: The correct answer is that water is polar and forms hydrogen bonds with other polar molecules. That
statement accurately reflects the underlying biology of water, pH, acids, bases, and buffers; the other choices
describe different processes or contain incorrect relationships.
4. Which statement best describes biological macromolecules?
A. a testable, falsifiable hypothesis links an observation to a proposed explanation
B. the number of protons determines the identity of an element
C. carbohydrates commonly provide energy and structural roles
D. water is polar and forms hydrogen bonds with other polar molecules
Correct Answer: C. carbohydrates commonly provide energy and structural roles
Rationale: The correct answer is that carbohydrates commonly provide energy and structural roles. That
statement accurately reflects the underlying biology of biological macromolecules; the other choices describe
different processes or contain incorrect relationships.
5. Which statement best describes prokaryotic and eukaryotic cells?
A. prokaryotic cells lack a membrane-bound nucleus
B. the phospholipid bilayer forms a selectively permeable boundary
C. a ligand binds specifically and reversibly to a compatible receptor
D. the nucleus houses most of the cell's DNA
Correct Answer: A. prokaryotic cells lack a membrane-bound nucleus
Rationale: The correct answer is that prokaryotic cells lack a membrane-bound nucleus. That statement
accurately reflects the underlying biology of prokaryotic and eukaryotic cells; the other choices describe different
processes or contain incorrect relationships.
6. Which statement best describes cell organelles and intracellular trafficking?
A. a ligand binds specifically and reversibly to a compatible receptor
B. prokaryotic cells lack a membrane-bound nucleus
C. the phospholipid bilayer forms a selectively permeable boundary
,D. the nucleus houses most of the cell's DNA
Correct Answer: D. the nucleus houses most of the cell's DNA
Rationale: The correct answer is that the nucleus houses most of the cell's DNA. That statement accurately
reflects the underlying biology of cell organelles and intracellular trafficking; the other choices describe different
processes or contain incorrect relationships.
7. Which statement best describes plasma membrane structure and transport?
A. prokaryotic cells lack a membrane-bound nucleus
B. the nucleus houses most of the cell's DNA
C. the phospholipid bilayer forms a selectively permeable boundary
D. a ligand binds specifically and reversibly to a compatible receptor
Correct Answer: C. the phospholipid bilayer forms a selectively permeable boundary
Rationale: The correct answer is that the phospholipid bilayer forms a selectively permeable boundary. That
statement accurately reflects the underlying biology of plasma membrane structure and transport; the other
choices describe different processes or contain incorrect relationships.
8. Which statement best describes cell signaling and receptors?
A. the nucleus houses most of the cell's DNA
B. a ligand binds specifically and reversibly to a compatible receptor
C. the phospholipid bilayer forms a selectively permeable boundary
D. prokaryotic cells lack a membrane-bound nucleus
Correct Answer: B. a ligand binds specifically and reversibly to a compatible receptor
Rationale: The correct answer is that a ligand binds specifically and reversibly to a compatible receptor. That
statement accurately reflects the underlying biology of cell signaling and receptors; the other choices describe
different processes or contain incorrect relationships.
9. Which statement best describes enzymes and metabolic regulation?
A. photosynthesis converts light energy into chemical energy stored in organic molecules
B. ATP stores usable chemical energy in phosphate-group interactions
C. glycolysis occurs in the cytosol and splits glucose into pyruvate
D. enzymes lower activation energy without being consumed by the reaction
Correct Answer: D. enzymes lower activation energy without being consumed by the reaction
Rationale: The correct answer is that enzymes lower activation energy without being consumed by the reaction.
That statement accurately reflects the underlying biology of enzymes and metabolic regulation; the other choices
describe different processes or contain incorrect relationships.
10. Which statement best describes ATP and cellular energy?
A. ATP stores usable chemical energy in phosphate-group interactions
B. enzymes lower activation energy without being consumed by the reaction
C. glycolysis occurs in the cytosol and splits glucose into pyruvate
D. photosynthesis converts light energy into chemical energy stored in organic molecules
Correct Answer: A. ATP stores usable chemical energy in phosphate-group interactions
Rationale: The correct answer is that ATP stores usable chemical energy in phosphate-group interactions. That
statement accurately reflects the underlying biology of ATP and cellular energy; the other choices describe
different processes or contain incorrect relationships.
11. Which statement best describes cellular respiration?
A. ATP stores usable chemical energy in phosphate-group interactions
B. glycolysis occurs in the cytosol and splits glucose into pyruvate
C. photosynthesis converts light energy into chemical energy stored in organic molecules
D. enzymes lower activation energy without being consumed by the reaction
Correct Answer: B. glycolysis occurs in the cytosol and splits glucose into pyruvate
Rationale: The correct answer is that glycolysis occurs in the cytosol and splits glucose into pyruvate. That
statement accurately reflects the underlying biology of cellular respiration; the other choices describe different
processes or contain incorrect relationships.
12. Which statement best describes photosynthesis?
A. glycolysis occurs in the cytosol and splits glucose into pyruvate
B. enzymes lower activation energy without being consumed by the reaction
C. photosynthesis converts light energy into chemical energy stored in organic molecules
, D. ATP stores usable chemical energy in phosphate-group interactions
Correct Answer: C. photosynthesis converts light energy into chemical energy stored in organic molecules
Rationale: The correct answer is that photosynthesis converts light energy into chemical energy stored in organic
molecules. That statement accurately reflects the underlying biology of photosynthesis; the other choices describe
different processes or contain incorrect relationships.
13. Which statement best describes DNA and RNA structure?
A. DNA replication is semiconservative, so each daughter molecule contains one old strand and one new strand
B. transcription uses a DNA template to synthesize RNA
C. DNA contains deoxyribose and thymine whereas RNA contains ribose and uracil
D. interphase includes G1, S, and G2 phases, with DNA replication occurring in S phase
Correct Answer: C. DNA contains deoxyribose and thymine whereas RNA contains ribose and uracil
Rationale: The correct answer is that DNA contains deoxyribose and thymine whereas RNA contains ribose and
uracil. That statement accurately reflects the underlying biology of DNA and RNA structure; the other choices
describe different processes or contain incorrect relationships.
14. Which statement best describes DNA replication?
A. meiosis reduces chromosome number and produces haploid cells from a diploid precursor
B. DNA replication is semiconservative, so each daughter molecule contains one old strand and one new strand
C. DNA contains deoxyribose and thymine whereas RNA contains ribose and uracil
D. transcription uses a DNA template to synthesize RNA
Correct Answer: B. DNA replication is semiconservative, so each daughter molecule contains one old strand and
one new strand
Rationale: The correct answer is that DNA replication is semiconservative, so each daughter molecule contains
one old strand and one new strand. That statement accurately reflects the underlying biology of DNA replication;
the other choices describe different processes or contain incorrect relationships.
15. Which statement best describes transcription and translation?
A. interphase includes G1, S, and G2 phases, with DNA replication occurring in S phase
B. meiosis reduces chromosome number and produces haploid cells from a diploid precursor
C. DNA contains deoxyribose and thymine whereas RNA contains ribose and uracil
D. transcription uses a DNA template to synthesize RNA
Correct Answer: D. transcription uses a DNA template to synthesize RNA
Rationale: The correct answer is that transcription uses a DNA template to synthesize RNA. That statement
accurately reflects the underlying biology of transcription and translation; the other choices describe different
processes or contain incorrect relationships.
16. Which statement best describes cell cycle, mitosis, and cytokinesis?
A. interphase includes G1, S, and G2 phases, with DNA replication occurring in S phase
B. DNA replication is semiconservative, so each daughter molecule contains one old strand and one new strand
C. transcription uses a DNA template to synthesize RNA
D. meiosis reduces chromosome number and produces haploid cells from a diploid precursor
Correct Answer: A. interphase includes G1, S, and G2 phases, with DNA replication occurring in S phase
Rationale: The correct answer is that interphase includes G1, S, and G2 phases, with DNA replication occurring
in S phase. That statement accurately reflects the underlying biology of cell cycle, mitosis, and cytokinesis; the
other choices describe different processes or contain incorrect relationships.
17. Which statement best describes meiosis and genetic variation?
A. DNA contains deoxyribose and thymine whereas RNA contains ribose and uracil
B. meiosis reduces chromosome number and produces haploid cells from a diploid precursor
C. DNA replication is semiconservative, so each daughter molecule contains one old strand and one new strand
D. transcription uses a DNA template to synthesize RNA
Correct Answer: B. meiosis reduces chromosome number and produces haploid cells from a diploid precursor
Rationale: The correct answer is that meiosis reduces chromosome number and produces haploid cells from a
diploid precursor. That statement accurately reflects the underlying biology of meiosis and genetic variation; the
other choices describe different processes or contain incorrect relationships.
18. Which statement best describes immune system basics?
A. innate immunity provides rapid, nonspecific defense mechanisms
B. homeostasis maintains internal variables within functional ranges rather than at perfectly fixed values
FINAL QUESTIONS WITH ANSWERS AND EXPLANATIONS
1. Which statement best describes scientific method and experimental design?
A. the number of protons determines the identity of an element
B. a testable, falsifiable hypothesis links an observation to a proposed explanation
C. water is polar and forms hydrogen bonds with other polar molecules
D. carbohydrates commonly provide energy and structural roles
Correct Answer: B. a testable, falsifiable hypothesis links an observation to a proposed explanation
Rationale: The correct answer is that a testable, falsifiable hypothesis links an observation to a proposed
explanation. That statement accurately reflects the underlying biology of scientific method and experimental
design; the other choices describe different processes or contain incorrect relationships.
2. Which statement best describes atomic structure and chemical bonding?
A. water is polar and forms hydrogen bonds with other polar molecules
B. carbohydrates commonly provide energy and structural roles
C. a testable, falsifiable hypothesis links an observation to a proposed explanation
D. the number of protons determines the identity of an element
Correct Answer: D. the number of protons determines the identity of an element
Rationale: The correct answer is that the number of protons determines the identity of an element. That statement
accurately reflects the underlying biology of atomic structure and chemical bonding; the other choices describe
different processes or contain incorrect relationships.
3. Which statement best describes water, pH, acids, bases, and buffers?
A. water is polar and forms hydrogen bonds with other polar molecules
B. carbohydrates commonly provide energy and structural roles
C. a testable, falsifiable hypothesis links an observation to a proposed explanation
D. the number of protons determines the identity of an element
Correct Answer: A. water is polar and forms hydrogen bonds with other polar molecules
Rationale: The correct answer is that water is polar and forms hydrogen bonds with other polar molecules. That
statement accurately reflects the underlying biology of water, pH, acids, bases, and buffers; the other choices
describe different processes or contain incorrect relationships.
4. Which statement best describes biological macromolecules?
A. a testable, falsifiable hypothesis links an observation to a proposed explanation
B. the number of protons determines the identity of an element
C. carbohydrates commonly provide energy and structural roles
D. water is polar and forms hydrogen bonds with other polar molecules
Correct Answer: C. carbohydrates commonly provide energy and structural roles
Rationale: The correct answer is that carbohydrates commonly provide energy and structural roles. That
statement accurately reflects the underlying biology of biological macromolecules; the other choices describe
different processes or contain incorrect relationships.
5. Which statement best describes prokaryotic and eukaryotic cells?
A. prokaryotic cells lack a membrane-bound nucleus
B. the phospholipid bilayer forms a selectively permeable boundary
C. a ligand binds specifically and reversibly to a compatible receptor
D. the nucleus houses most of the cell's DNA
Correct Answer: A. prokaryotic cells lack a membrane-bound nucleus
Rationale: The correct answer is that prokaryotic cells lack a membrane-bound nucleus. That statement
accurately reflects the underlying biology of prokaryotic and eukaryotic cells; the other choices describe different
processes or contain incorrect relationships.
6. Which statement best describes cell organelles and intracellular trafficking?
A. a ligand binds specifically and reversibly to a compatible receptor
B. prokaryotic cells lack a membrane-bound nucleus
C. the phospholipid bilayer forms a selectively permeable boundary
,D. the nucleus houses most of the cell's DNA
Correct Answer: D. the nucleus houses most of the cell's DNA
Rationale: The correct answer is that the nucleus houses most of the cell's DNA. That statement accurately
reflects the underlying biology of cell organelles and intracellular trafficking; the other choices describe different
processes or contain incorrect relationships.
7. Which statement best describes plasma membrane structure and transport?
A. prokaryotic cells lack a membrane-bound nucleus
B. the nucleus houses most of the cell's DNA
C. the phospholipid bilayer forms a selectively permeable boundary
D. a ligand binds specifically and reversibly to a compatible receptor
Correct Answer: C. the phospholipid bilayer forms a selectively permeable boundary
Rationale: The correct answer is that the phospholipid bilayer forms a selectively permeable boundary. That
statement accurately reflects the underlying biology of plasma membrane structure and transport; the other
choices describe different processes or contain incorrect relationships.
8. Which statement best describes cell signaling and receptors?
A. the nucleus houses most of the cell's DNA
B. a ligand binds specifically and reversibly to a compatible receptor
C. the phospholipid bilayer forms a selectively permeable boundary
D. prokaryotic cells lack a membrane-bound nucleus
Correct Answer: B. a ligand binds specifically and reversibly to a compatible receptor
Rationale: The correct answer is that a ligand binds specifically and reversibly to a compatible receptor. That
statement accurately reflects the underlying biology of cell signaling and receptors; the other choices describe
different processes or contain incorrect relationships.
9. Which statement best describes enzymes and metabolic regulation?
A. photosynthesis converts light energy into chemical energy stored in organic molecules
B. ATP stores usable chemical energy in phosphate-group interactions
C. glycolysis occurs in the cytosol and splits glucose into pyruvate
D. enzymes lower activation energy without being consumed by the reaction
Correct Answer: D. enzymes lower activation energy without being consumed by the reaction
Rationale: The correct answer is that enzymes lower activation energy without being consumed by the reaction.
That statement accurately reflects the underlying biology of enzymes and metabolic regulation; the other choices
describe different processes or contain incorrect relationships.
10. Which statement best describes ATP and cellular energy?
A. ATP stores usable chemical energy in phosphate-group interactions
B. enzymes lower activation energy without being consumed by the reaction
C. glycolysis occurs in the cytosol and splits glucose into pyruvate
D. photosynthesis converts light energy into chemical energy stored in organic molecules
Correct Answer: A. ATP stores usable chemical energy in phosphate-group interactions
Rationale: The correct answer is that ATP stores usable chemical energy in phosphate-group interactions. That
statement accurately reflects the underlying biology of ATP and cellular energy; the other choices describe
different processes or contain incorrect relationships.
11. Which statement best describes cellular respiration?
A. ATP stores usable chemical energy in phosphate-group interactions
B. glycolysis occurs in the cytosol and splits glucose into pyruvate
C. photosynthesis converts light energy into chemical energy stored in organic molecules
D. enzymes lower activation energy without being consumed by the reaction
Correct Answer: B. glycolysis occurs in the cytosol and splits glucose into pyruvate
Rationale: The correct answer is that glycolysis occurs in the cytosol and splits glucose into pyruvate. That
statement accurately reflects the underlying biology of cellular respiration; the other choices describe different
processes or contain incorrect relationships.
12. Which statement best describes photosynthesis?
A. glycolysis occurs in the cytosol and splits glucose into pyruvate
B. enzymes lower activation energy without being consumed by the reaction
C. photosynthesis converts light energy into chemical energy stored in organic molecules
, D. ATP stores usable chemical energy in phosphate-group interactions
Correct Answer: C. photosynthesis converts light energy into chemical energy stored in organic molecules
Rationale: The correct answer is that photosynthesis converts light energy into chemical energy stored in organic
molecules. That statement accurately reflects the underlying biology of photosynthesis; the other choices describe
different processes or contain incorrect relationships.
13. Which statement best describes DNA and RNA structure?
A. DNA replication is semiconservative, so each daughter molecule contains one old strand and one new strand
B. transcription uses a DNA template to synthesize RNA
C. DNA contains deoxyribose and thymine whereas RNA contains ribose and uracil
D. interphase includes G1, S, and G2 phases, with DNA replication occurring in S phase
Correct Answer: C. DNA contains deoxyribose and thymine whereas RNA contains ribose and uracil
Rationale: The correct answer is that DNA contains deoxyribose and thymine whereas RNA contains ribose and
uracil. That statement accurately reflects the underlying biology of DNA and RNA structure; the other choices
describe different processes or contain incorrect relationships.
14. Which statement best describes DNA replication?
A. meiosis reduces chromosome number and produces haploid cells from a diploid precursor
B. DNA replication is semiconservative, so each daughter molecule contains one old strand and one new strand
C. DNA contains deoxyribose and thymine whereas RNA contains ribose and uracil
D. transcription uses a DNA template to synthesize RNA
Correct Answer: B. DNA replication is semiconservative, so each daughter molecule contains one old strand and
one new strand
Rationale: The correct answer is that DNA replication is semiconservative, so each daughter molecule contains
one old strand and one new strand. That statement accurately reflects the underlying biology of DNA replication;
the other choices describe different processes or contain incorrect relationships.
15. Which statement best describes transcription and translation?
A. interphase includes G1, S, and G2 phases, with DNA replication occurring in S phase
B. meiosis reduces chromosome number and produces haploid cells from a diploid precursor
C. DNA contains deoxyribose and thymine whereas RNA contains ribose and uracil
D. transcription uses a DNA template to synthesize RNA
Correct Answer: D. transcription uses a DNA template to synthesize RNA
Rationale: The correct answer is that transcription uses a DNA template to synthesize RNA. That statement
accurately reflects the underlying biology of transcription and translation; the other choices describe different
processes or contain incorrect relationships.
16. Which statement best describes cell cycle, mitosis, and cytokinesis?
A. interphase includes G1, S, and G2 phases, with DNA replication occurring in S phase
B. DNA replication is semiconservative, so each daughter molecule contains one old strand and one new strand
C. transcription uses a DNA template to synthesize RNA
D. meiosis reduces chromosome number and produces haploid cells from a diploid precursor
Correct Answer: A. interphase includes G1, S, and G2 phases, with DNA replication occurring in S phase
Rationale: The correct answer is that interphase includes G1, S, and G2 phases, with DNA replication occurring
in S phase. That statement accurately reflects the underlying biology of cell cycle, mitosis, and cytokinesis; the
other choices describe different processes or contain incorrect relationships.
17. Which statement best describes meiosis and genetic variation?
A. DNA contains deoxyribose and thymine whereas RNA contains ribose and uracil
B. meiosis reduces chromosome number and produces haploid cells from a diploid precursor
C. DNA replication is semiconservative, so each daughter molecule contains one old strand and one new strand
D. transcription uses a DNA template to synthesize RNA
Correct Answer: B. meiosis reduces chromosome number and produces haploid cells from a diploid precursor
Rationale: The correct answer is that meiosis reduces chromosome number and produces haploid cells from a
diploid precursor. That statement accurately reflects the underlying biology of meiosis and genetic variation; the
other choices describe different processes or contain incorrect relationships.
18. Which statement best describes immune system basics?
A. innate immunity provides rapid, nonspecific defense mechanisms
B. homeostasis maintains internal variables within functional ranges rather than at perfectly fixed values
