Test BankSystems Biology of Cell Signaling Recurring Themes and Quantitative Questions and answers with Solutions.pdf

Test Bank
Systems Biology of Cell Signaling
Recurring Themes and Quantitative
Questions and answers with Solutions


🧠 CORE PRACTICE QUESTIONS
SYSTEMS BIOLOGY OF CELL SIGNALING – STUDY GUIDE




🔹 Cell Signaling Basics
1. Cell signaling is best defined as:

A. DNA replication​
B. Communication between cells using signals​
C. Protein destruction​
D. Cell death only​
Answer: B

2. A ligand is:

A. A DNA molecule​
B. A signaling molecule that binds a receptor​
C. A lipid membrane​
D. A protein enzyme only​
Answer: B

3. Receptors are located:

,A. Only in nucleus​
B. On membrane or inside cell​
C. Only in blood​
D. Only in mitochondria​
Answer: B




🔹 Quantitative Modeling
4. Ordinary differential equations (ODEs) describe:

A. Static images​
B. Change over time​
C. Protein color​
D. Cell shape only​
Answer: B

5. In signaling models, rate constants represent:

A. Cell size​
B. Speed of reactions​
C. DNA length​
D. Temperature only​
Answer: B

6. A steady state occurs when:

A. No molecules exist​
B. Input = output (no net change)​
C. Cell dies​
D. DNA mutates​
Answer: B




🔹 Feedback Systems
7. Positive feedback causes:

A. Stability​
B. Amplification​
C. No change​

, D. Inhibition only​
Answer: B

8. Negative feedback causes:

A. Instability​
B. Stability/homeostasis​
C. Mutation​
D. Cell death always​
Answer: B

9. Biological switches are often:

A. Linear systems​
B. Nonlinear systems​
C. Random systems​
D. No-feedback systems​
Answer: B




🔹 Switches & Bistability
10. Bistability means:

A. One stable state​
B. Two stable states​
C. No state​
D. Infinite states​
Answer: B

11. A biological switch is useful for:

A. Gradual response​
B. All-or-none response​
C. No response​
D. Random response​
Answer: B

12. Hysteresis means:

A. Same input always gives same output​
B. Output depends on history​
C. No signal​