BIOS 251 Exam Prep Questions and Answers with Rationales |
CHAMBERLAIN UNIVERSITY
Question 1. A bone-matrix component provide hardness and resistance to compression. Identify it.
Determine the most defensible conclusion.
A. osteoid
B. type I collagen
C. keratin
D. hydroxyapatite crystals
Correct Answer: D. hydroxyapatite crystals
Explanation: Hydroxyapatite crystals provide hardness and resistance to compression. Bone strength depends on both
organic collagen-rich matrix and inorganic mineral. Loss of either component reduces the mechanical quality of bone. The
alternatives are weaker because they do not match the governing rule, definition, or facts presented in the question.
Question 2. Based on the described finding: A knee ligament supports the lateral knee against excessive
varus stress. Identify it.
A. anterior cruciate ligament
B. posterior cruciate ligament
C. medial collateral ligament
D. lateral collateral ligament
Correct Answer: D. lateral collateral ligament
Explanation: The lateral collateral ligament supports the lateral knee against excessive varus stress. The cruciate ligaments
primarily control anterior-posterior translation, while collateral ligaments resist side-to-side angulation. Ligament function
is best understood in terms of the abnormal motion each structure restrains. The alternatives are weaker because they do not
match the governing rule, definition, or facts presented in the question.
Question 3. Interpret the description: A skeletal concept is concentrated mainly in axial skeleton and
selected proximal epiphyses and supports hematopoiesis. Identify it.
A. yellow marrow in adults
B. periosteal fibers
C. red marrow in adults
D. bone remodeling
Correct Answer: C. red marrow in adults
Explanation: Red marrow in adults is concentrated mainly in axial skeleton and selected proximal epiphyses and supports
hematopoiesis. Bone anatomy reflects a balance among vascular supply, mechanical loading, matrix organization, and
cellular remodeling. These principles recur in growth, repair, and mineral homeostasis. The alternatives are weaker because
they do not match the governing rule, definition, or facts presented in the question.
Question 4. Consider oxytocin intensifying uterine contractions during labor. Classify the control pattern.
A. positive feedback
B. negative feedback
C. passive equilibrium
D. feedforward control
Correct Answer: A. positive feedback
Explanation: This is positive feedback because the response strengthens contractions until birth ends the loop. Negative
feedback reverses deviations, whereas positive feedback amplifies a process toward an endpoint. Recognizing the loop type
clarifies why some physiologic responses stabilize variables while others rapidly drive a process to completion. The
alternatives are weaker because they do not match the governing rule, definition, or facts presented in the question.
,Question 5. Apply the relevant course concept: A cell process is described as passive movement down a
concentration gradient through a channel or carrier. Identify the transport mechanism.
A. facilitated diffusion
B. secondary active transport
C. primary active transport
D. osmosis
Correct Answer: A. facilitated diffusion
Explanation: Facilitated diffusion is passive movement down a concentration gradient through a channel or carrier. Passive
processes do not directly require ATP, whereas active or vesicular processes use cellular energy. Transport mechanisms
determine how nutrients, ions, water, and signaling molecules cross cell boundaries. The other choices are weaker because
they reflect a different formula, input, interpretation, or arithmetic result.
Question 6. Evaluate the information provided: Within the nucleus, identify the structure described as the
highly organized DNA-protein structure especially visible during cell division.
A. nuclear pore
B. chromatin
C. chromosome
D. nuclear envelope
Correct Answer: C. chromosome
Explanation: The chromosome is the highly organized DNA-protein structure especially visible during cell division.
Nuclear structures organize DNA and regulate access to genetic information. Their coordinated function supports
replication and gene expression. The alternatives are weaker because they do not match the governing rule, definition, or
facts presented in the question.
Question 7. In anatomical position, the sternum is ______ to the vertebral column. Determine the most
defensible conclusion.
A. posterior
B. anterior
C. ipsilateral
D. proximal
Correct Answer: B. anterior
Explanation: The sternum is anterior to the vertebral column when standard anatomical position is used. Directional terms
are defined from anatomical position, even if the person is lying or moving. Consistent directional language reduces
ambiguity in examination findings and documentation. The alternatives are weaker because they do not match the
governing rule, definition, or facts presented in the question.
Question 8. Classify the occipital bone of the skull.
A. auditory ossicle
B. cranial bone
C. facial bone
D. hyoid bone
Correct Answer: B. cranial bone
Explanation: The occipital is one of the bones forming the cranium that encloses and protects the brain. Facial bones
primarily form the framework of the face rather than the cranial vault or base. Distinguishing cranial from facial bones is
foundational for skull identification. The alternatives are weaker because they do not match the governing rule, definition,
or facts presented in the question.
,Question 9. Interpret the description: Identify the sternal landmark described as the small inferior portion
of the sternum.
A. xiphoid process
B. sternal angle
C. body of sternum
D. manubrium
Correct Answer: A. xiphoid process
Explanation: The xiphoid process is the small inferior portion of the sternum. The sternum has distinct regions and palpable
landmarks. The sternal angle is especially useful for counting ribs during physical examination. The alternatives are weaker
because they do not match the governing rule, definition, or facts presented in the question.
Question 10. A connective-tissue fiber is needed for high tensile strength. Select the fiber.
A. keratin filament
B. collagen fiber
C. reticular fiber
D. elastic fiber
Correct Answer: B. collagen fiber
Explanation: Collagen fiber provides high tensile strength. The fiber types differ in tensile strength, elasticity, and
network-forming properties. Their relative abundance helps determine the mechanical behavior of a tissue. The alternatives
are weaker because they do not match the governing rule, definition, or facts presented in the question.
Question 11. Apply the relevant course concept: Consider glucose entering a cell through a carrier without
ATP use and down its concentration gradient. Name the dominant transport mechanism.
A. simple diffusion
B. primary active transport
C. facilitated diffusion
D. receptor-mediated endocytosis
Correct Answer: C. facilitated diffusion
Explanation: The scenario describes facilitated diffusion. Transport is classified by whether movement follows a gradient,
requires a membrane protein, directly uses ATP, or uses vesicles. Correct classification predicts energy requirements and
directionality. The other choices are weaker because they reflect a different formula, input, interpretation, or arithmetic
result.
Question 12. Evaluate the information provided: On the pelvic bone, identify the landmark that large
opening formed by pubis and ischium.
A. obturator foramen
B. lesser trochanter
C. glenoid cavity
D. anterior superior iliac spine
Correct Answer: A. obturator foramen
Explanation: The obturator foramen of the pelvic bone large opening formed by pubis and ischium. Appendicular
landmarks often serve as articular surfaces or attachment sites and are named by position or shape. Accurate landmark
recognition is central to skeletal laboratory exams. The alternatives are weaker because they do not match the governing
rule, definition, or facts presented in the question.
, Question 13. Identify the nucleic-acid component described as one that contains deoxyribose and usually
forms a double helix and long-term storage of genetic information. Determine the most defensible
conclusion.
A. thymine
B. DNA
C. RNA
D. uracil
Correct Answer: B. DNA
Explanation: DNA contains deoxyribose and usually forms a double helix and is associated with long-term storage of
genetic information. DNA and RNA differ in sugar, one pyrimidine base, typical strand structure, and cellular role. These
molecular distinctions underlie information storage and protein synthesis. The alternatives are weaker because they do not
match the governing rule, definition, or facts presented in the question.
Question 14. A skeletal concept formation of bone tissue and includes matrix production and
mineralization. Identify it.
A. yellow marrow in adults
B. ossification
C. trabeculae of spongy bone
D. bone remodeling
Correct Answer: B. ossification
Explanation: Ossification formation of bone tissue and includes matrix production and mineralization. Bone anatomy
reflects a balance among vascular supply, mechanical loading, matrix organization, and cellular remodeling. These
principles recur in growth, repair, and mineral homeostasis. The alternatives are weaker because they do not match the
governing rule, definition, or facts presented in the question.
Question 15. Interpret the description: A lipid local signaling lipid derived from fatty acids and participates
in inflammation and other short-range signals. Identify it.
A. eicosanoid
B. cholesterol
C. unsaturated fatty acid
D. saturated fatty acid
Correct Answer: A. eicosanoid
Explanation: Eicosanoid local signaling lipid derived from fatty acids and participates in inflammation and other
short-range signals. Lipid classes differ in structure and therefore in membrane, storage, or signaling function.
Structure-function links are especially important for membrane composition and energy storage. The alternatives are
weaker because they do not match the governing rule, definition, or facts presented in the question.
Question 16. Documentation describes the sole of foot region. Choose the correct anatomical regional term.
A. fibular
B. cervical
C. popliteal
D. plantar
Correct Answer: D. plantar
Explanation: The plantar region refers to the sole of foot. Regional terms provide standardized names for surface anatomy
and reduce ambiguous descriptions. They are commonly used when documenting examination findings or specimen
locations. The alternatives are weaker because they do not match the governing rule, definition, or facts presented in the
question.
CHAMBERLAIN UNIVERSITY
Question 1. A bone-matrix component provide hardness and resistance to compression. Identify it.
Determine the most defensible conclusion.
A. osteoid
B. type I collagen
C. keratin
D. hydroxyapatite crystals
Correct Answer: D. hydroxyapatite crystals
Explanation: Hydroxyapatite crystals provide hardness and resistance to compression. Bone strength depends on both
organic collagen-rich matrix and inorganic mineral. Loss of either component reduces the mechanical quality of bone. The
alternatives are weaker because they do not match the governing rule, definition, or facts presented in the question.
Question 2. Based on the described finding: A knee ligament supports the lateral knee against excessive
varus stress. Identify it.
A. anterior cruciate ligament
B. posterior cruciate ligament
C. medial collateral ligament
D. lateral collateral ligament
Correct Answer: D. lateral collateral ligament
Explanation: The lateral collateral ligament supports the lateral knee against excessive varus stress. The cruciate ligaments
primarily control anterior-posterior translation, while collateral ligaments resist side-to-side angulation. Ligament function
is best understood in terms of the abnormal motion each structure restrains. The alternatives are weaker because they do not
match the governing rule, definition, or facts presented in the question.
Question 3. Interpret the description: A skeletal concept is concentrated mainly in axial skeleton and
selected proximal epiphyses and supports hematopoiesis. Identify it.
A. yellow marrow in adults
B. periosteal fibers
C. red marrow in adults
D. bone remodeling
Correct Answer: C. red marrow in adults
Explanation: Red marrow in adults is concentrated mainly in axial skeleton and selected proximal epiphyses and supports
hematopoiesis. Bone anatomy reflects a balance among vascular supply, mechanical loading, matrix organization, and
cellular remodeling. These principles recur in growth, repair, and mineral homeostasis. The alternatives are weaker because
they do not match the governing rule, definition, or facts presented in the question.
Question 4. Consider oxytocin intensifying uterine contractions during labor. Classify the control pattern.
A. positive feedback
B. negative feedback
C. passive equilibrium
D. feedforward control
Correct Answer: A. positive feedback
Explanation: This is positive feedback because the response strengthens contractions until birth ends the loop. Negative
feedback reverses deviations, whereas positive feedback amplifies a process toward an endpoint. Recognizing the loop type
clarifies why some physiologic responses stabilize variables while others rapidly drive a process to completion. The
alternatives are weaker because they do not match the governing rule, definition, or facts presented in the question.
,Question 5. Apply the relevant course concept: A cell process is described as passive movement down a
concentration gradient through a channel or carrier. Identify the transport mechanism.
A. facilitated diffusion
B. secondary active transport
C. primary active transport
D. osmosis
Correct Answer: A. facilitated diffusion
Explanation: Facilitated diffusion is passive movement down a concentration gradient through a channel or carrier. Passive
processes do not directly require ATP, whereas active or vesicular processes use cellular energy. Transport mechanisms
determine how nutrients, ions, water, and signaling molecules cross cell boundaries. The other choices are weaker because
they reflect a different formula, input, interpretation, or arithmetic result.
Question 6. Evaluate the information provided: Within the nucleus, identify the structure described as the
highly organized DNA-protein structure especially visible during cell division.
A. nuclear pore
B. chromatin
C. chromosome
D. nuclear envelope
Correct Answer: C. chromosome
Explanation: The chromosome is the highly organized DNA-protein structure especially visible during cell division.
Nuclear structures organize DNA and regulate access to genetic information. Their coordinated function supports
replication and gene expression. The alternatives are weaker because they do not match the governing rule, definition, or
facts presented in the question.
Question 7. In anatomical position, the sternum is ______ to the vertebral column. Determine the most
defensible conclusion.
A. posterior
B. anterior
C. ipsilateral
D. proximal
Correct Answer: B. anterior
Explanation: The sternum is anterior to the vertebral column when standard anatomical position is used. Directional terms
are defined from anatomical position, even if the person is lying or moving. Consistent directional language reduces
ambiguity in examination findings and documentation. The alternatives are weaker because they do not match the
governing rule, definition, or facts presented in the question.
Question 8. Classify the occipital bone of the skull.
A. auditory ossicle
B. cranial bone
C. facial bone
D. hyoid bone
Correct Answer: B. cranial bone
Explanation: The occipital is one of the bones forming the cranium that encloses and protects the brain. Facial bones
primarily form the framework of the face rather than the cranial vault or base. Distinguishing cranial from facial bones is
foundational for skull identification. The alternatives are weaker because they do not match the governing rule, definition,
or facts presented in the question.
,Question 9. Interpret the description: Identify the sternal landmark described as the small inferior portion
of the sternum.
A. xiphoid process
B. sternal angle
C. body of sternum
D. manubrium
Correct Answer: A. xiphoid process
Explanation: The xiphoid process is the small inferior portion of the sternum. The sternum has distinct regions and palpable
landmarks. The sternal angle is especially useful for counting ribs during physical examination. The alternatives are weaker
because they do not match the governing rule, definition, or facts presented in the question.
Question 10. A connective-tissue fiber is needed for high tensile strength. Select the fiber.
A. keratin filament
B. collagen fiber
C. reticular fiber
D. elastic fiber
Correct Answer: B. collagen fiber
Explanation: Collagen fiber provides high tensile strength. The fiber types differ in tensile strength, elasticity, and
network-forming properties. Their relative abundance helps determine the mechanical behavior of a tissue. The alternatives
are weaker because they do not match the governing rule, definition, or facts presented in the question.
Question 11. Apply the relevant course concept: Consider glucose entering a cell through a carrier without
ATP use and down its concentration gradient. Name the dominant transport mechanism.
A. simple diffusion
B. primary active transport
C. facilitated diffusion
D. receptor-mediated endocytosis
Correct Answer: C. facilitated diffusion
Explanation: The scenario describes facilitated diffusion. Transport is classified by whether movement follows a gradient,
requires a membrane protein, directly uses ATP, or uses vesicles. Correct classification predicts energy requirements and
directionality. The other choices are weaker because they reflect a different formula, input, interpretation, or arithmetic
result.
Question 12. Evaluate the information provided: On the pelvic bone, identify the landmark that large
opening formed by pubis and ischium.
A. obturator foramen
B. lesser trochanter
C. glenoid cavity
D. anterior superior iliac spine
Correct Answer: A. obturator foramen
Explanation: The obturator foramen of the pelvic bone large opening formed by pubis and ischium. Appendicular
landmarks often serve as articular surfaces or attachment sites and are named by position or shape. Accurate landmark
recognition is central to skeletal laboratory exams. The alternatives are weaker because they do not match the governing
rule, definition, or facts presented in the question.
, Question 13. Identify the nucleic-acid component described as one that contains deoxyribose and usually
forms a double helix and long-term storage of genetic information. Determine the most defensible
conclusion.
A. thymine
B. DNA
C. RNA
D. uracil
Correct Answer: B. DNA
Explanation: DNA contains deoxyribose and usually forms a double helix and is associated with long-term storage of
genetic information. DNA and RNA differ in sugar, one pyrimidine base, typical strand structure, and cellular role. These
molecular distinctions underlie information storage and protein synthesis. The alternatives are weaker because they do not
match the governing rule, definition, or facts presented in the question.
Question 14. A skeletal concept formation of bone tissue and includes matrix production and
mineralization. Identify it.
A. yellow marrow in adults
B. ossification
C. trabeculae of spongy bone
D. bone remodeling
Correct Answer: B. ossification
Explanation: Ossification formation of bone tissue and includes matrix production and mineralization. Bone anatomy
reflects a balance among vascular supply, mechanical loading, matrix organization, and cellular remodeling. These
principles recur in growth, repair, and mineral homeostasis. The alternatives are weaker because they do not match the
governing rule, definition, or facts presented in the question.
Question 15. Interpret the description: A lipid local signaling lipid derived from fatty acids and participates
in inflammation and other short-range signals. Identify it.
A. eicosanoid
B. cholesterol
C. unsaturated fatty acid
D. saturated fatty acid
Correct Answer: A. eicosanoid
Explanation: Eicosanoid local signaling lipid derived from fatty acids and participates in inflammation and other
short-range signals. Lipid classes differ in structure and therefore in membrane, storage, or signaling function.
Structure-function links are especially important for membrane composition and energy storage. The alternatives are
weaker because they do not match the governing rule, definition, or facts presented in the question.
Question 16. Documentation describes the sole of foot region. Choose the correct anatomical regional term.
A. fibular
B. cervical
C. popliteal
D. plantar
Correct Answer: D. plantar
Explanation: The plantar region refers to the sole of foot. Regional terms provide standardized names for surface anatomy
and reduce ambiguous descriptions. They are commonly used when documenting examination findings or specimen
locations. The alternatives are weaker because they do not match the governing rule, definition, or facts presented in the
question.
