PCR-RFLP Mastery Quiz

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Siwar Chelbi

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PCR-RFLP Mastery Quiz


PCR-RFLP Mastery QuizVersión en línea Test your PCR-RFLP knowledge por Siwar Chelbi 1 In PCR-RFLP, what is the purpose of using restriction enzymes after PCR amplification? a To sequence the entire gene b To detect mutations by creating or abolishing restriction sites c To label the PCR fragments for imaging d To digest only RNA before analysis 2 HbS mutation in beta-globin affects which process shown in the slides? a Protein translation speed b RNA splicing of HbS mRNA c DNA methylation pattern d Restriction site recognition by BsuI leading to different fragments 3 If HbA normal has two fragments after digestion and HbS mutated shows one fragment, what does that indicate? a There are two mutations b The enzyme failed to digest c The PCR failed d The mutation abolishes a restriction site 4 What are the typical fragment sizes given for the HbS case after BsuI digestion? a 300 bp and 50 bp b 200 bp and 56 bp fragments c 100 bp and 50 bp d 256 bp only 5 Which enzyme is used to detect the C677T MTHFR polymorphism in the presentation? a EcoRI b BsuI c ApaI d HinfI 6 What is the general role of restriction enzymes in PCR-RFLP applications? a To convert DNA to RNA b To cut DNA at defined sites for genotype interpretation c To remove introns from genes d To amplify DNA non-specifically 7 What would be expected if a mutation creates a new restriction site in a PCR product? a Fragments disappear entirely b No change in fragment pattern c PCR amplification stops d Additional fragment(s) appear after digestion 8 In the MTHFR example, what bands indicate a homozygous normal (CC) genotype after HinfI digestion? a One band at 198 bp b Three bands 198, 175, 25 bp c No bands at all d Two bands 175 bp and 25 bp 9 What are the typical steps in a PCR-RFLP workflow as shown in the slides? a Whole-genome sequencing, alignment, interpretation b PCR amplification, restriction digest, electrophoresis c Protein assay, Western blot, imaging d RNA extraction, cloning, sequencing 10 Why is electrophoresis used after restriction digestion in these experiments? a To measure RNA quality b To sterilize the sample c To reveal the fragment size pattern that indicates genotype d To quantify protein levels Feedback 1 Restriction enzymes cut DNA at specific sites; mutations can create or abolish these sites, forming different fragment patterns 2 The HbS mutation alters a restriction site for BsuI, changing fragment sizes after digestion 3 A single fragment indicates loss of a restriction site due to mutation, preventing cutting 4 In HbS, digestion yields two fragments 200 bp and 56 bp in the normal vs mutated pattern described 5 HinfI creates a site allowing differentiation of C vs T at position 677 in MTHFR 6 Enzymes cut at specific palindromic sequences, enabling fragment pattern analysis for genotyping 7 A new site yields extra cuts, altering fragment sizes observed on gel 8 CC yields a single uncut fragment of 198 bp when the restriction site is absent or uncut 9 Process is PCR, digest with restriction enzyme, then gel electrophoresis to view fragments 10 Gel electrophoresis separates fragments by size, enabling genotype interpretation from band patterns

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PCR-RFLP Mastery Quiz

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PCR-RFLP Mastery QuizVersión en línea

por Siwar Chelbi

In PCR-RFLP, what is the purpose of using restriction enzymes after PCR amplification?

HbS mutation in beta-globin affects which process shown in the slides?

If HbA normal has two fragments after digestion and HbS mutated shows one fragment, what does that indicate?

What are the typical fragment sizes given for the HbS case after BsuI digestion?

Which enzyme is used to detect the C677T MTHFR polymorphism in the presentation?

What is the general role of restriction enzymes in PCR-RFLP applications?

What would be expected if a mutation creates a new restriction site in a PCR product?

In the MTHFR example, what bands indicate a homozygous normal (CC) genotype after HinfI digestion?

What are the typical steps in a PCR-RFLP workflow as shown in the slides?

Why is electrophoresis used after restriction digestion in these experiments?

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