1|Page
BIO 1050 FINAL EXAM ECU NEWEST 2026 ACTUAL EXAM TEST
BANK| COMPLETE eXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+ (BRAND
NEW!!)
Which statement best describes the central principle of cell theory?
A. All organisms are composed of one or more cells, and cells arise from
preexisting cells
B. Only multicellular organisms are composed of cells
C. Cells can develop spontaneously from nonliving material
D. All cells contain identical structures and functions
Answer: A
Rationale: Cell theory states that cells are the basic units of life, all living
organisms consist of cells, and new cells arise from existing cells.
Which organelle is primarily responsible for producing ATP through
aerobic cellular respiration?
A. Lysosome
B. Mitochondrion
C. Ribosome
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D. Golgi apparatus
Answer: B
Rationale: Mitochondria generate most cellular ATP through aerobic
respiration.
Which structure controls what substances enter and leave the cell?
A. Cell wall
B. Cytoplasm
C. Plasma membrane
D. Nucleolus
Answer: C
Rationale: The plasma membrane is selectively permeable and
regulates movement of substances across the cell boundary.
A cell is placed in a solution with a higher solute concentration than the
cell interior. What will most likely happen?
A. Water moves into the cell
B. Water moves out of the cell
C. Solutes stop moving completely
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D. The cell immediately divides
Answer: B
Rationale: In a hypertonic solution, water moves out of the cell by
osmosis.
Which process requires cellular energy to move substances against their
concentration gradient?
A. Simple diffusion
B. Osmosis
C. Facilitated diffusion
D. Active transport
Answer: D
Rationale: Active transport uses energy, usually ATP, to move substances
against their concentration gradient.
Which macromolecule is primarily used for long-term energy storage?
A. Lipids
B. Proteins
C. Nucleic acids
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D. Minerals
Answer: A
Rationale: Lipids provide concentrated energy storage and also perform
structural and signaling functions.
Which macromolecule contains amino acids as its basic building blocks?
A. Carbohydrates
B. Proteins
C. Lipids
D. Nucleic acids
Answer: B
Rationale: Proteins are polymers composed of amino acids linked by
peptide bonds.
Which molecule carries genetic information in most living organisms?
A. ATP
B. DNA
C. Glucose
D. Cholesterol
BIO 1050 FINAL EXAM ECU NEWEST 2026 ACTUAL EXAM TEST
BANK| COMPLETE eXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+ (BRAND
NEW!!)
Which statement best describes the central principle of cell theory?
A. All organisms are composed of one or more cells, and cells arise from
preexisting cells
B. Only multicellular organisms are composed of cells
C. Cells can develop spontaneously from nonliving material
D. All cells contain identical structures and functions
Answer: A
Rationale: Cell theory states that cells are the basic units of life, all living
organisms consist of cells, and new cells arise from existing cells.
Which organelle is primarily responsible for producing ATP through
aerobic cellular respiration?
A. Lysosome
B. Mitochondrion
C. Ribosome
,2|Page
D. Golgi apparatus
Answer: B
Rationale: Mitochondria generate most cellular ATP through aerobic
respiration.
Which structure controls what substances enter and leave the cell?
A. Cell wall
B. Cytoplasm
C. Plasma membrane
D. Nucleolus
Answer: C
Rationale: The plasma membrane is selectively permeable and
regulates movement of substances across the cell boundary.
A cell is placed in a solution with a higher solute concentration than the
cell interior. What will most likely happen?
A. Water moves into the cell
B. Water moves out of the cell
C. Solutes stop moving completely
,3|Page
D. The cell immediately divides
Answer: B
Rationale: In a hypertonic solution, water moves out of the cell by
osmosis.
Which process requires cellular energy to move substances against their
concentration gradient?
A. Simple diffusion
B. Osmosis
C. Facilitated diffusion
D. Active transport
Answer: D
Rationale: Active transport uses energy, usually ATP, to move substances
against their concentration gradient.
Which macromolecule is primarily used for long-term energy storage?
A. Lipids
B. Proteins
C. Nucleic acids
, 4|Page
D. Minerals
Answer: A
Rationale: Lipids provide concentrated energy storage and also perform
structural and signaling functions.
Which macromolecule contains amino acids as its basic building blocks?
A. Carbohydrates
B. Proteins
C. Lipids
D. Nucleic acids
Answer: B
Rationale: Proteins are polymers composed of amino acids linked by
peptide bonds.
Which molecule carries genetic information in most living organisms?
A. ATP
B. DNA
C. Glucose
D. Cholesterol
