6. Techniques

Pcr Methods — Quiz

Test your understanding of pcr methods with 5 practice questions.

Practice Questions

Question 1

What is the primary rationale for using a 'touchdown PCR' protocol in conventional PCR?

Question 2

In qPCR, a standard curve yields the linear regression equation Ct = -3.8 log10(conc) + 42 with R^2 = 0.98. What is the amplification efficiency (E) of the assay? Show your calculation.

Question 3

During a digital PCR experiment, 60% of partitions show no amplification. What is the average number of templates per partition ($\lambda$)? Use $\lambda=-\ln(p_0)$. Show your calculation.

Question 4

In the context of qPCR standard curves, why is the correlation coefficient (R^2) important?

Question 5

Using the ΔΔCt method, calculate the relative expression level of Gene X in a treated sample versus control, given: control Ct target=20, control Ct reference=18; treated Ct target=23, treated Ct reference=18. Show your calculation.