BIO 201 MIDTERM EXAM – A&P
2026/2027 QUESTIONS WITH CORRECT
ANSWERS (LATEST ), (A+
GUARANTEE).
1. Which of the following best describes the physiological process of negative feedback?
A. The response of the effector increases the stimulus.
B. The control center ignores the signal from the receptor.
C. The response of the effector negates or decreases the stimulus.
D. The stimulus is amplified to reach a climax.
Answer: C
Conceptual Explanation: Negative feedback mechanisms act to oppose or reduce the
initial stimulus, helping to maintain homeostasis by bringing a variable back to its set point.
2. In which anatomical plane would you divide the body into superior and inferior portions?
A. Sagittal plane
B. Frontal plane
C. Coronal plane
D. Transverse plane
,Answer: D
Conceptual Explanation: A transverse (or horizontal) plane divides the body or an organ
into upper (superior) and lower (inferior) portions.
3. The plasma membrane is described as a ‘fluid mosaic’. What component is primarily
responsible for the ‘fluid’ nature of the membrane?
A. Integral proteins
B. Phospholipid bilayer
C. Peripheral proteins
D. Cholesterol molecules
Answer: B
Conceptual Explanation: The phospholipid bilayer provides the fluid matrix in which
proteins move; cholesterol helps regulate this fluidity but the phospholipids are the
primary fluid component.
4. Which transport mechanism requires ATP to move substances against their concentration
gradient?
A. Facilitated diffusion
B. Simple diffusion
C. Primary active transport
D. Osmosis
, Answer: C
Conceptual Explanation: Active transport uses energy (ATP) to move solutes against a
concentration gradient, whereas diffusion and osmosis are passive processes.
5. During which phase of the cell cycle does DNA replication occur?
A. S phase
B. G1 phase
C. G2 phase
D. M phase
Answer: A
Conceptual Explanation: DNA replication occurs specifically during the Synthesis (S)
phase of interphase.
6. Which organelle is responsible for the synthesis of lipids and the detoxification of drugs?
A. Smooth endoplasmic reticulum
B. Golgi apparatus
C. Rough endoplasmic reticulum
D. Lysosomes
Answer: A
2026/2027 QUESTIONS WITH CORRECT
ANSWERS (LATEST ), (A+
GUARANTEE).
1. Which of the following best describes the physiological process of negative feedback?
A. The response of the effector increases the stimulus.
B. The control center ignores the signal from the receptor.
C. The response of the effector negates or decreases the stimulus.
D. The stimulus is amplified to reach a climax.
Answer: C
Conceptual Explanation: Negative feedback mechanisms act to oppose or reduce the
initial stimulus, helping to maintain homeostasis by bringing a variable back to its set point.
2. In which anatomical plane would you divide the body into superior and inferior portions?
A. Sagittal plane
B. Frontal plane
C. Coronal plane
D. Transverse plane
,Answer: D
Conceptual Explanation: A transverse (or horizontal) plane divides the body or an organ
into upper (superior) and lower (inferior) portions.
3. The plasma membrane is described as a ‘fluid mosaic’. What component is primarily
responsible for the ‘fluid’ nature of the membrane?
A. Integral proteins
B. Phospholipid bilayer
C. Peripheral proteins
D. Cholesterol molecules
Answer: B
Conceptual Explanation: The phospholipid bilayer provides the fluid matrix in which
proteins move; cholesterol helps regulate this fluidity but the phospholipids are the
primary fluid component.
4. Which transport mechanism requires ATP to move substances against their concentration
gradient?
A. Facilitated diffusion
B. Simple diffusion
C. Primary active transport
D. Osmosis
, Answer: C
Conceptual Explanation: Active transport uses energy (ATP) to move solutes against a
concentration gradient, whereas diffusion and osmosis are passive processes.
5. During which phase of the cell cycle does DNA replication occur?
A. S phase
B. G1 phase
C. G2 phase
D. M phase
Answer: A
Conceptual Explanation: DNA replication occurs specifically during the Synthesis (S)
phase of interphase.
6. Which organelle is responsible for the synthesis of lipids and the detoxification of drugs?
A. Smooth endoplasmic reticulum
B. Golgi apparatus
C. Rough endoplasmic reticulum
D. Lysosomes
Answer: A
