WGU D027 OBJECTIVE ASSESSMENT EXAM
TESTBANK AND A COMPREHENSIVE STUDY GUIDE
COMPLETE ACCURATE TEST QUESTIONS AND
CORRECT VERIFIED ANSWERS (A NEW UPDATED
VERSIONS) |GUARANTEED PASS A+
Genetics & Cellular Function
Q1. Which of the following is NOT a primary function of the cell membrane?
A. Regulating transport of substances in and out of the cell
B. Providing structural support and cell recognition
C. Synthesizing proteins for cellular use
D. Facilitating cell-to-cell communication
Correct Answer: C
Rationale: Protein synthesis occurs on ribosomes (free or attached to rough ER), not on the cell
membrane. The membrane regulates transport, provides structural support via glycoproteins, and
facilitates communication .
Q2. A patient is diagnosed with an autosomal dominant disorder. Which statement best describes the
inheritance pattern?
A. Both parents must be carriers for the child to be affected
B. Only males are affected, and the trait skips generations
C. One affected parent gives a 50% chance of passing the disorder to each child
D. The disorder only manifests if the child inherits two recessive alleles
Correct Answer: C
Rationale: Only one copy of the mutated allele is needed. If one parent is affected (heterozygous),
there is a 50% transmission risk per pregnancy .
Q3. Which genetic condition is characterized by trisomy 21?
A. Turner Syndrome
B. Klinefelter Syndrome
C. Down Syndrome
D. Cystic Fibrosis
Correct Answer: C
Rationale: Down Syndrome results from trisomy 21 (three copies of chromosome 21). Turner is
monosomy X, Klinefelter is XXY, and CF is a single-gene mutation .
Q4. A newborn is diagnosed with 47,XXY karyotype. This condition is known as:
A. Turner Syndrome
,B. Klinefelter Syndrome
C. Down Syndrome
D. Edwards Syndrome
Correct Answer: B
Rationale: Klinefelter syndrome (47,XXY) affects males and is associated with tall stature,
gynecomastia, small testes, and infertility .
Q5. In an autosomal recessive disorder, if both parents are carriers, what is the probability their child
will be affected?
A. 0%
B. 25%
C. 50%
D. 100%
Correct Answer: B
Rationale: Carrier parents (Aa × Aa) have a 25% chance of having an affected child (aa) following
Mendelian inheritance patterns .
Q6. Which cellular organelle is responsible for ATP production through aerobic respiration?
A. Nucleus
B. Ribosome
C. Mitochondrion
D. Golgi apparatus
Correct Answer: C
Rationale: Mitochondria generate ATP through oxidative phosphorylation and the Krebs cycle, making
them the "powerhouses" of the cell .
Autoimmune & Genetic Disorders
Q7. A patient with cystic fibrosis asks why she has difficulty clearing mucus. The NP explains that the
pathophysiology involves:
A. Overproduction of sodium channels in the kidneys
B. Defective chloride transport leading to thick, viscous secretions
C. Absence of alpha-1 antitrypsin in the lungs
D. Autoimmune destruction of exocrine glands
Correct Answer: B
Rationale: CFTR mutations cause defective chloride transport, leading to thick mucus in the lungs
(chronic infections) and pancreas (malabsorption) .
Q8. Which laboratory test is the gold standard for diagnosing celiac disease?
A. Serum IgG antibodies
B. IgA tissue transglutaminase (tTG) antibody with total IgA level
C. Stool antigen test
D. Endoscopy with small intestine biopsy
Correct Answer: D
Rationale: While IgA-tTG is a highly sensitive serologic test, endoscopy with small bowel biopsy
remains the gold standard to confirm diagnosis by showing villous atrophy .
,Q9. A 20-year-old male has difficulty running, jumping, and rising from a sitting position. He walks on
his toes. Family history is non-contributory. Which condition is likely?
A. Duchenne Muscular Dystrophy
B. Becker Muscular Dystrophy
C. Myasthenia Gravis
D. Multiple Sclerosis
Correct Answer: B
Rationale: Becker muscular dystrophy is an X-linked recessive disorder with later onset and slower
progression than Duchenne. Difficulty with gait (toe walking) and proximal muscle weakness (difficulty
rising) are characteristic .
Q10. Sjögren's syndrome is an autoimmune disorder that primarily affects:
A. The thyroid gland, causing hyperthyroidism
B. Exocrine glands, leading to dry eyes and dry mouth
C. The pancreas, causing insulin deficiency
D. The adrenal cortex, causing cortisol excess
Correct Answer: B
Rationale: It targets salivary and lacrimal glands, causing xerostomia (dry mouth) and
keratoconjunctivitis sicca (dry eyes) .
🫀 Cardiology & Pulmonology
Q11. What are symptoms of right-sided heart failure?
A. Pulmonary congestion and crackles
B. Peripheral edema and jugular venous distension
C. Hypertension and bounding pulses
D. Cyanosis and clubbing
Correct Answer: B
Rationale: Right-sided failure causes systemic venous congestion due to ineffective right ventricular
pumping, leading to peripheral edema, ascites, and JVD .
Q12. What is the most common cause of right-sided heart failure?
A. Pulmonary hypertension
B. Left-sided heart failure
C. Myocardial infarction
D. Valvular stenosis
Correct Answer: B
Rationale: The number one cause is left-sided heart failure. Backflow into the pulmonary circulation
increases pressure, causing right ventricular failure .
Q13. For a patient with asthma exacerbation, what is the mechanism of albuterol?
A. Corticosteroid-mediated anti-inflammatory action
B. Muscarinic receptor antagonism
C. Beta-2 receptor stimulation relaxing bronchial smooth muscle
D. Leukotriene inhibition
Correct Answer: C
, Rationale: Albuterol is a selective beta-2 adrenergic agonist that binds to receptors on bronchial
smooth muscle, leading to relaxation and bronchodilation .
Pharmacology & Pharmacodynamics
Q14. In opioid use disorder, what property of buprenorphine makes it suitable for maintenance
therapy?
A. Full agonist with high abuse potential
B. Partial agonist with a ceiling effect on respiratory depression
C. Long-acting sedative hypnotic
D. NMDA receptor antagonist
Correct Answer: B
Rationale: Its partial agonism at mu-receptors provides a ceiling effect on respiratory depression,
reducing abuse liability and overdose risk .
Q15. A patient with type 2 diabetes is started on metformin. What is its primary pathophysiologic
mechanism?
A. Increasing insulin secretion from the pancreas
B. Decreasing glucose absorption from the intestines
C. Reducing hepatic gluconeogenesis and improving insulin sensitivity
D. Blocking glucose reabsorption in the kidneys
Correct Answer: C
Rationale: Metformin activates AMPK, which suppresses hepatic glucose production and enhances
insulin sensitivity without causing hypoglycemia .
Q16. What side effect should you watch for in a patient taking a statin drug?
A. Dry cough
B. Muscle pain potentially leading to rhabdomyolysis
C. Hyperglycemia
D. Bradycardia
Correct Answer: B
Rationale: Statin-induced myopathy ranges from mild myalgia to life-threatening rhabdomyolysis with
acute renal failure .
Endocrine & Neurology
Q17. What is the normal range for TSH level?
A. 0.1 - 0.5 mIU/L
B. 0.4 - 4.0 mIU/L
C. 5.0 - 10.0 mIU/L
D. 10.0 - 20.0 mIU/L
Correct Answer: B
Rationale: The standard reference range for thyroid-stimulating hormone (TSH) is approximately 0.4 to
4.0 mIU/L .
TESTBANK AND A COMPREHENSIVE STUDY GUIDE
COMPLETE ACCURATE TEST QUESTIONS AND
CORRECT VERIFIED ANSWERS (A NEW UPDATED
VERSIONS) |GUARANTEED PASS A+
Genetics & Cellular Function
Q1. Which of the following is NOT a primary function of the cell membrane?
A. Regulating transport of substances in and out of the cell
B. Providing structural support and cell recognition
C. Synthesizing proteins for cellular use
D. Facilitating cell-to-cell communication
Correct Answer: C
Rationale: Protein synthesis occurs on ribosomes (free or attached to rough ER), not on the cell
membrane. The membrane regulates transport, provides structural support via glycoproteins, and
facilitates communication .
Q2. A patient is diagnosed with an autosomal dominant disorder. Which statement best describes the
inheritance pattern?
A. Both parents must be carriers for the child to be affected
B. Only males are affected, and the trait skips generations
C. One affected parent gives a 50% chance of passing the disorder to each child
D. The disorder only manifests if the child inherits two recessive alleles
Correct Answer: C
Rationale: Only one copy of the mutated allele is needed. If one parent is affected (heterozygous),
there is a 50% transmission risk per pregnancy .
Q3. Which genetic condition is characterized by trisomy 21?
A. Turner Syndrome
B. Klinefelter Syndrome
C. Down Syndrome
D. Cystic Fibrosis
Correct Answer: C
Rationale: Down Syndrome results from trisomy 21 (three copies of chromosome 21). Turner is
monosomy X, Klinefelter is XXY, and CF is a single-gene mutation .
Q4. A newborn is diagnosed with 47,XXY karyotype. This condition is known as:
A. Turner Syndrome
,B. Klinefelter Syndrome
C. Down Syndrome
D. Edwards Syndrome
Correct Answer: B
Rationale: Klinefelter syndrome (47,XXY) affects males and is associated with tall stature,
gynecomastia, small testes, and infertility .
Q5. In an autosomal recessive disorder, if both parents are carriers, what is the probability their child
will be affected?
A. 0%
B. 25%
C. 50%
D. 100%
Correct Answer: B
Rationale: Carrier parents (Aa × Aa) have a 25% chance of having an affected child (aa) following
Mendelian inheritance patterns .
Q6. Which cellular organelle is responsible for ATP production through aerobic respiration?
A. Nucleus
B. Ribosome
C. Mitochondrion
D. Golgi apparatus
Correct Answer: C
Rationale: Mitochondria generate ATP through oxidative phosphorylation and the Krebs cycle, making
them the "powerhouses" of the cell .
Autoimmune & Genetic Disorders
Q7. A patient with cystic fibrosis asks why she has difficulty clearing mucus. The NP explains that the
pathophysiology involves:
A. Overproduction of sodium channels in the kidneys
B. Defective chloride transport leading to thick, viscous secretions
C. Absence of alpha-1 antitrypsin in the lungs
D. Autoimmune destruction of exocrine glands
Correct Answer: B
Rationale: CFTR mutations cause defective chloride transport, leading to thick mucus in the lungs
(chronic infections) and pancreas (malabsorption) .
Q8. Which laboratory test is the gold standard for diagnosing celiac disease?
A. Serum IgG antibodies
B. IgA tissue transglutaminase (tTG) antibody with total IgA level
C. Stool antigen test
D. Endoscopy with small intestine biopsy
Correct Answer: D
Rationale: While IgA-tTG is a highly sensitive serologic test, endoscopy with small bowel biopsy
remains the gold standard to confirm diagnosis by showing villous atrophy .
,Q9. A 20-year-old male has difficulty running, jumping, and rising from a sitting position. He walks on
his toes. Family history is non-contributory. Which condition is likely?
A. Duchenne Muscular Dystrophy
B. Becker Muscular Dystrophy
C. Myasthenia Gravis
D. Multiple Sclerosis
Correct Answer: B
Rationale: Becker muscular dystrophy is an X-linked recessive disorder with later onset and slower
progression than Duchenne. Difficulty with gait (toe walking) and proximal muscle weakness (difficulty
rising) are characteristic .
Q10. Sjögren's syndrome is an autoimmune disorder that primarily affects:
A. The thyroid gland, causing hyperthyroidism
B. Exocrine glands, leading to dry eyes and dry mouth
C. The pancreas, causing insulin deficiency
D. The adrenal cortex, causing cortisol excess
Correct Answer: B
Rationale: It targets salivary and lacrimal glands, causing xerostomia (dry mouth) and
keratoconjunctivitis sicca (dry eyes) .
🫀 Cardiology & Pulmonology
Q11. What are symptoms of right-sided heart failure?
A. Pulmonary congestion and crackles
B. Peripheral edema and jugular venous distension
C. Hypertension and bounding pulses
D. Cyanosis and clubbing
Correct Answer: B
Rationale: Right-sided failure causes systemic venous congestion due to ineffective right ventricular
pumping, leading to peripheral edema, ascites, and JVD .
Q12. What is the most common cause of right-sided heart failure?
A. Pulmonary hypertension
B. Left-sided heart failure
C. Myocardial infarction
D. Valvular stenosis
Correct Answer: B
Rationale: The number one cause is left-sided heart failure. Backflow into the pulmonary circulation
increases pressure, causing right ventricular failure .
Q13. For a patient with asthma exacerbation, what is the mechanism of albuterol?
A. Corticosteroid-mediated anti-inflammatory action
B. Muscarinic receptor antagonism
C. Beta-2 receptor stimulation relaxing bronchial smooth muscle
D. Leukotriene inhibition
Correct Answer: C
, Rationale: Albuterol is a selective beta-2 adrenergic agonist that binds to receptors on bronchial
smooth muscle, leading to relaxation and bronchodilation .
Pharmacology & Pharmacodynamics
Q14. In opioid use disorder, what property of buprenorphine makes it suitable for maintenance
therapy?
A. Full agonist with high abuse potential
B. Partial agonist with a ceiling effect on respiratory depression
C. Long-acting sedative hypnotic
D. NMDA receptor antagonist
Correct Answer: B
Rationale: Its partial agonism at mu-receptors provides a ceiling effect on respiratory depression,
reducing abuse liability and overdose risk .
Q15. A patient with type 2 diabetes is started on metformin. What is its primary pathophysiologic
mechanism?
A. Increasing insulin secretion from the pancreas
B. Decreasing glucose absorption from the intestines
C. Reducing hepatic gluconeogenesis and improving insulin sensitivity
D. Blocking glucose reabsorption in the kidneys
Correct Answer: C
Rationale: Metformin activates AMPK, which suppresses hepatic glucose production and enhances
insulin sensitivity without causing hypoglycemia .
Q16. What side effect should you watch for in a patient taking a statin drug?
A. Dry cough
B. Muscle pain potentially leading to rhabdomyolysis
C. Hyperglycemia
D. Bradycardia
Correct Answer: B
Rationale: Statin-induced myopathy ranges from mild myalgia to life-threatening rhabdomyolysis with
acute renal failure .
Endocrine & Neurology
Q17. What is the normal range for TSH level?
A. 0.1 - 0.5 mIU/L
B. 0.4 - 4.0 mIU/L
C. 5.0 - 10.0 mIU/L
D. 10.0 - 20.0 mIU/L
Correct Answer: B
Rationale: The standard reference range for thyroid-stimulating hormone (TSH) is approximately 0.4 to
4.0 mIU/L .
