Page 1 of 69
PLTW Medical Interventions Final Exam ALL 250
QUESTIONS AND CORRECT ANSWERS LATEST
UPDATE THIS YEAR
1. Which scenario best represents a medical intervention?
A. Recording a patient’s family history
B. Monitoring heart rate without action
C. Administering insulin to a diabetic patient
D. Observing symptoms over time
✅ Answer: C
Rationale: A medical intervention actively alters or improves a disease condition; insulin
directly manages diabetes.
2. Which category of medical intervention focuses on identifying disease?
A. Preventative
B. Diagnostic
C. Therapeutic
D. Rehabilitative
✅ Answer: B
Rationale: Diagnostic interventions identify the presence or cause of disease.
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, Page 2 of 69
3. Why is DNA sequencing useful during disease outbreaks?
A. It treats infected patients
B. It replaces antibiotics
C. It identifies genetic variations of pathogens
D. It destroys pathogens
✅ Answer: C
Rationale: Sequencing detects mutations that help identify and track pathogens.
4. Which field combines biology, computer science, and data analysis?
A. Epidemiology
B. Immunology
C. Bioinformatics
D. Biotechnology
✅ Answer: C
Rationale: Bioinformatics uses computers to analyze biological data, especially genetic
sequences.
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, Page 3 of 69
5. Antibodies bind to antigens primarily because of:
A. Electrical charge
B. Shape complementarity
C. Enzyme activity
D. Temperature
✅ Answer: B
Rationale: Antibodies recognize antigens through specific shape matching.
6. What does a color change in an ELISA test indicate?
A. Absence of antibodies
B. Presence of enzyme inhibitors
C. Antigen-antibody interaction
D. DNA replication
✅ Answer: C
Rationale: Color change confirms binding between antibodies and antigens.
7. Why is antigen concentration important during outbreak investigations?
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, Page 4 of 69
A. It determines patient age
B. It helps identify exposure timeline
C. It determines blood type
D. It predicts antibiotic side effects
✅ Answer: B
Rationale: Higher antigen levels often indicate earlier exposure.
8. Which bacterial feature allows attachment to host cells?
A. Ribosomes
B. Flagella
C. Adhesins
D. Plasmids
✅ Answer: C
Rationale: Adhesins help bacteria adhere to surfaces and host tissues.
9. Which structure is directly responsible for protein synthesis in bacteria?
A. Nucleoid
B. Cell wall
4
PLTW Medical Interventions Final Exam ALL 250
QUESTIONS AND CORRECT ANSWERS LATEST
UPDATE THIS YEAR
1. Which scenario best represents a medical intervention?
A. Recording a patient’s family history
B. Monitoring heart rate without action
C. Administering insulin to a diabetic patient
D. Observing symptoms over time
✅ Answer: C
Rationale: A medical intervention actively alters or improves a disease condition; insulin
directly manages diabetes.
2. Which category of medical intervention focuses on identifying disease?
A. Preventative
B. Diagnostic
C. Therapeutic
D. Rehabilitative
✅ Answer: B
Rationale: Diagnostic interventions identify the presence or cause of disease.
1
, Page 2 of 69
3. Why is DNA sequencing useful during disease outbreaks?
A. It treats infected patients
B. It replaces antibiotics
C. It identifies genetic variations of pathogens
D. It destroys pathogens
✅ Answer: C
Rationale: Sequencing detects mutations that help identify and track pathogens.
4. Which field combines biology, computer science, and data analysis?
A. Epidemiology
B. Immunology
C. Bioinformatics
D. Biotechnology
✅ Answer: C
Rationale: Bioinformatics uses computers to analyze biological data, especially genetic
sequences.
2
, Page 3 of 69
5. Antibodies bind to antigens primarily because of:
A. Electrical charge
B. Shape complementarity
C. Enzyme activity
D. Temperature
✅ Answer: B
Rationale: Antibodies recognize antigens through specific shape matching.
6. What does a color change in an ELISA test indicate?
A. Absence of antibodies
B. Presence of enzyme inhibitors
C. Antigen-antibody interaction
D. DNA replication
✅ Answer: C
Rationale: Color change confirms binding between antibodies and antigens.
7. Why is antigen concentration important during outbreak investigations?
3
, Page 4 of 69
A. It determines patient age
B. It helps identify exposure timeline
C. It determines blood type
D. It predicts antibiotic side effects
✅ Answer: B
Rationale: Higher antigen levels often indicate earlier exposure.
8. Which bacterial feature allows attachment to host cells?
A. Ribosomes
B. Flagella
C. Adhesins
D. Plasmids
✅ Answer: C
Rationale: Adhesins help bacteria adhere to surfaces and host tissues.
9. Which structure is directly responsible for protein synthesis in bacteria?
A. Nucleoid
B. Cell wall
4
