Complete Exam Guide Subject-wise practice platform
Molecular Pathology

PCR Techniques Practice Questions

20 free PCR Techniques practice questions for the Pathology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.

Start Practice Quiz

Questions

All PCR Techniques questions

20 questions
  1. Q1. Which of the following temperature sequences correctly represents the three main steps of a standard PCR cycle?
  2. Q2. In Real-Time PCR (qPCR), what does the 'Ct' (cycle threshold) value represent?
  3. Q3. Which enzyme is essential for performing PCR when the starting material is messenger RNA (mRNA)?
  4. Q4. What is the primary purpose of adding Magnesium Chloride ($MgCl_2$) to a PCR master mix?
  5. Q5. Which PCR technique is specifically designed to amplify a target with extremely low copy numbers by using two sets of primers in successive reactions?
  6. Q6. In molecular pathology, 'Multiplex PCR' refers to a reaction where:
  7. Q7. Which of the following is a common cause of 'primer dimer' formation in a PCR reaction?
  8. Q8. How does 'Hot-Start' PCR improve the specificity of DNA amplification?
  9. Q9. Digital PCR (dPCR) offers which major advantage over traditional quantitative Real-Time PCR?
  10. Q10. What is the function of the SYBR Green I dye in a qPCR assay?
  11. Q11. Which component of a TaqMan probe is responsible for suppressing fluorescence when the probe is intact?
  12. Q12. In the context of PCR contamination, what is the role of Uracil-N-Glycosylase (UNG)?
  13. Q13. A 'Melt Curve' analysis is typically performed at the end of a qPCR run using SYBR Green to:
  14. Q14. What is the theoretical amplification factor for a single target DNA molecule after 30 cycles of perfectly efficient PCR?
  15. Q15. Which of the following modifications is used in Allele-Specific PCR to detect a Single Nucleotide Polymorphism (SNP)?
  16. Q16. Which term describes the temperature at which half of the DNA duplexes dissociate into single strands?
  17. Q17. What is the primary advantage of using a 'Droplet Digital PCR' system for detecting rare mutations in liquid biopsies?
  18. Q18. In the clinical laboratory, 'Clean Room' protocols for PCR involve which of the following?
  19. Q19. Long-range PCR techniques allow for the amplification of DNA fragments up to which size?
  20. Q20. What happens if the annealing temperature in a PCR protocol is set too low?