Essentials of Biology, 7th Edition by Mader and
Windelspecht Test Bank Questions And Correct
Answers (Verified Answers) Plus Rationales
2025/2026 Q&A | Instant Download Pdf
1. Which organelle is responsible for ATP production?
A. Nucleus
B. Mitochondrion
C. Ribosome
D. Golgi apparatus
Answer: B. Mitochondrion
Mitochondria are the site of cellular respiration, producing ATP
from glucose.
2. The fluid mosaic model describes the structure of the:
A. Plasma membrane
B. Nucleus
C. Cytoskeleton
D. Endoplasmic reticulum
Answer: A. Plasma membrane
The plasma membrane consists of a lipid bilayer with embedded
proteins that move laterally.
3. Ribosomes function in:
A. Lipid synthesis
B. Energy production
C. Protein synthesis
D. DNA replication
Answer: C. Protein synthesis
Ribosomes translate mRNA into polypeptide chains (proteins).
4. Which structure contains digestive enzymes and breaks down
waste?
A. Nucleus
, B. Lysosome
C. Mitochondrion
D. Chloroplast
Answer: B. Lysosome
Lysosomes digest macromolecules and damaged cell parts
using hydrolytic enzymes.
5. Plant cell walls are primarily made of:
A. Chitin
B. Starch
C. Peptidoglycan
D. Cellulose
Answer: D. Cellulose
Cellulose fibers give structure and support to plant cells.
Cellular Processes
6. In osmosis, water moves from a region of:
A. High solute concentration to low solute concentration
B. Equal solute concentration to unequal solute concentration
C. Low solute concentration to high solute concentration
D. None of the above
Answer: C. Low solute concentration to high solute
concentration
Water diffuses across a membrane toward the area with more
solutes.
7. Active transport requires:
A. Diffusion
B. Energy (ATP)
C. Osmosis
D. Facilitated diffusion
Answer: B. Energy (ATP)
, Active transport moves substances against their gradient using
ATP.
8. Which stage of cellular respiration produces the most ATP?
A. Glycolysis
B. Krebs cycle
C. Fermentation
D. Electron transport chain
Answer: D. Electron transport chain
The electron transport chain generates the most ATP via
oxidative phosphorylation.
9. Glycolysis occurs in the:
A. Cytoplasm
B. Nucleus
C. Mitochondrial matrix
D. Endoplasmic reticulum
Answer: A. Cytoplasm
Glycolysis breaks down glucose into pyruvate in the cytosol.
10. During photosynthesis, oxygen is released when:
A. Carbon dioxide is fixed in the Calvin cycle
B. Water is split in the light reactions
C. Glucose is produced
D. ATP is hydrolyzed
Answer: B. Water is split in the light reactions
Water splitting in photosynthesis yields O₂, electrons, and
protons.
Genetics
11. A gene’s sequence determines the sequence of:
A. DNA bases
B. Nucleotides in RNA
Windelspecht Test Bank Questions And Correct
Answers (Verified Answers) Plus Rationales
2025/2026 Q&A | Instant Download Pdf
1. Which organelle is responsible for ATP production?
A. Nucleus
B. Mitochondrion
C. Ribosome
D. Golgi apparatus
Answer: B. Mitochondrion
Mitochondria are the site of cellular respiration, producing ATP
from glucose.
2. The fluid mosaic model describes the structure of the:
A. Plasma membrane
B. Nucleus
C. Cytoskeleton
D. Endoplasmic reticulum
Answer: A. Plasma membrane
The plasma membrane consists of a lipid bilayer with embedded
proteins that move laterally.
3. Ribosomes function in:
A. Lipid synthesis
B. Energy production
C. Protein synthesis
D. DNA replication
Answer: C. Protein synthesis
Ribosomes translate mRNA into polypeptide chains (proteins).
4. Which structure contains digestive enzymes and breaks down
waste?
A. Nucleus
, B. Lysosome
C. Mitochondrion
D. Chloroplast
Answer: B. Lysosome
Lysosomes digest macromolecules and damaged cell parts
using hydrolytic enzymes.
5. Plant cell walls are primarily made of:
A. Chitin
B. Starch
C. Peptidoglycan
D. Cellulose
Answer: D. Cellulose
Cellulose fibers give structure and support to plant cells.
Cellular Processes
6. In osmosis, water moves from a region of:
A. High solute concentration to low solute concentration
B. Equal solute concentration to unequal solute concentration
C. Low solute concentration to high solute concentration
D. None of the above
Answer: C. Low solute concentration to high solute
concentration
Water diffuses across a membrane toward the area with more
solutes.
7. Active transport requires:
A. Diffusion
B. Energy (ATP)
C. Osmosis
D. Facilitated diffusion
Answer: B. Energy (ATP)
, Active transport moves substances against their gradient using
ATP.
8. Which stage of cellular respiration produces the most ATP?
A. Glycolysis
B. Krebs cycle
C. Fermentation
D. Electron transport chain
Answer: D. Electron transport chain
The electron transport chain generates the most ATP via
oxidative phosphorylation.
9. Glycolysis occurs in the:
A. Cytoplasm
B. Nucleus
C. Mitochondrial matrix
D. Endoplasmic reticulum
Answer: A. Cytoplasm
Glycolysis breaks down glucose into pyruvate in the cytosol.
10. During photosynthesis, oxygen is released when:
A. Carbon dioxide is fixed in the Calvin cycle
B. Water is split in the light reactions
C. Glucose is produced
D. ATP is hydrolyzed
Answer: B. Water is split in the light reactions
Water splitting in photosynthesis yields O₂, electrons, and
protons.
Genetics
11. A gene’s sequence determines the sequence of:
A. DNA bases
B. Nucleotides in RNA
