BIO 201 EXAM 1 RIO SALADO ACTUAL
EXAM QUESTIONS AND ANSWERS, LATEST
2025/2026
1. Which term means “toward the midline of the body”?
Answer: Medial
Rationale: "Medial" refers to a structure closer to the midline; "lateral"
is farther away.
2. The smallest structural and functional unit of the human body is
the:
Answer: Cell
Rationale: Cells perform all basic life functions; tissues are groups of
cells.
3. The membrane lining body cavities open to the exterior is the:
Answer: Mucous membrane
Rationale: Mucous membranes line the respiratory, digestive, urinary,
and reproductive tracts.
4. The spleen and thymus belong to which system?
Answer: Lymphatic system
Rationale: Both organs filter and monitor body fluids for immune
protection.
, 5. The pH scale measures:
Answer: Hydrogen ion concentration
Rationale: pH is inversely related to H+ concentration: low pH = high
H+.
6. A solution with a pH of 2 is considered:
Answer: Strongly acidic
Rationale: The lower the pH, the more acidic; <7 = acid.
7. The monomers of proteins are:
Answer: Amino acids
Rationale: Amino acids link via peptide bonds to form proteins.
8. The primary energy molecule of the cell is:
Answer: ATP
Rationale: ATP stores and transfers energy for cellular processes.
9. Ribosomes are responsible for:
Answer: Protein synthesis
Rationale: Ribosomes read mRNA and assemble amino acids.
10. The organelle that modifies and packages proteins is the:
EXAM QUESTIONS AND ANSWERS, LATEST
2025/2026
1. Which term means “toward the midline of the body”?
Answer: Medial
Rationale: "Medial" refers to a structure closer to the midline; "lateral"
is farther away.
2. The smallest structural and functional unit of the human body is
the:
Answer: Cell
Rationale: Cells perform all basic life functions; tissues are groups of
cells.
3. The membrane lining body cavities open to the exterior is the:
Answer: Mucous membrane
Rationale: Mucous membranes line the respiratory, digestive, urinary,
and reproductive tracts.
4. The spleen and thymus belong to which system?
Answer: Lymphatic system
Rationale: Both organs filter and monitor body fluids for immune
protection.
, 5. The pH scale measures:
Answer: Hydrogen ion concentration
Rationale: pH is inversely related to H+ concentration: low pH = high
H+.
6. A solution with a pH of 2 is considered:
Answer: Strongly acidic
Rationale: The lower the pH, the more acidic; <7 = acid.
7. The monomers of proteins are:
Answer: Amino acids
Rationale: Amino acids link via peptide bonds to form proteins.
8. The primary energy molecule of the cell is:
Answer: ATP
Rationale: ATP stores and transfers energy for cellular processes.
9. Ribosomes are responsible for:
Answer: Protein synthesis
Rationale: Ribosomes read mRNA and assemble amino acids.
10. The organelle that modifies and packages proteins is the:
