What is the first step in nanoparticle probe technology steps?

What is the first step in nanoparticle probe technology steps?

• A. PCR amplification
• B. Nucleic acid extraction
• C. Hybridization of target DNA
• D. Signal amplification

Answer: (B)

The starting point is obtaining the target nucleic acids from the sample. Nucleic acid extraction is essential because it isolates DNA or RNA and removes proteins, salts, inhibitors, and debris that could interfere with downstream steps such as probe hybridization or amplification. Without a clean, accessible target, you cannot reliably perform later actions like amplification, hybridization to nanoparticle probes, or signal generation. Once extraction is done, the workflow may proceed to amplify the target if needed, then hybridize the target (or amplified product) to the nanoparticle probes, and finally generate a detectable signal. The other steps depend on having the nucleic acid material ready, so they aren’t appropriate to begin with.

The starting point is obtaining the target nucleic acids from the sample. Nucleic acid extraction is essential because it isolates DNA or RNA and removes proteins, salts, inhibitors, and debris that could interfere with downstream steps such as probe hybridization or amplification. Without a clean, accessible target, you cannot reliably perform later actions like amplification, hybridization to nanoparticle probes, or signal generation.

Once extraction is done, the workflow may proceed to amplify the target if needed, then hybridize the target (or amplified product) to the nanoparticle probes, and finally generate a detectable signal. The other steps depend on having the nucleic acid material ready, so they aren’t appropriate to begin with.