Which of the following is responsible for detecting sequence variations in DNA during RFLP analysis?

Question

BlackTom AI · Accepted Answer

To approach this question, let's examine what each option implies in the context of RFLP analysis.
Option 1: Restriction enzyme. In RFLP (Restriction Fragment Length Polymorphism) analysis, restriction enzymes cut DNA at specific sequences. Variations in the DNA sequence can create or abolish these cut sites, leading to different patterns of fragment lengths. Therefore, the enzyme's ability to recognize and cut at specific sequences is central to detecting sequence variations. This makes this option a strong fit for the role described.
Option 2: Antibodies. Antibodies recognize specific antigens, typically proteins or other molecules, not DNA sequences. They are not used to detect sequence variations in RFLP analysis, which is a DNA-based technique relying on restriction sites rather than antigen–antibody interactions. This makes this option incorrect.
Option 3: Primers. Primers are short DNA sequences used to initiate DNA synthesis in PCR or sequencing workflows. While primers are essential in amplification or preparation steps, they do not detect sequence variations by themselves in RFLP; they do not determine where restriction enzymes cut. This option describes a different functional role, not the core detection mechanism in RFLP.
Option 4: DNA polymerase. DNA polymerase synthesizes new DNA strands during replication or amplification. It does not directly detect sequence variations in RFLP, which hinges on the presence or absence of restriction sites and resulting fragment patterns, rather than polymerization activity. This makes this option incorrect.
Overall, Option 1 correctly identifies the component whose sequence-specific activity enables the detection of variations in RFLP analysis, while the other options describe tools or enzymes with roles outside the fundamental mechanism of detecting restriction-site-based differences.

MEDS2013 (ND) Week 8 Practice Quiz

Which of the following is responsible for detecting sequence variations in DNA during RFLP analysis?

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