Consider the image below. This image shows plasmid DNA isolated through exactly the same method that you used. The lanes that were untreated (TE) contain plasmid DNA, but also large amounts of smaller nucleic acids that are predicted to be RNA. What is the experimental evidence from the gel itself that these smaller molecules are RNA? (Hint: look at the treatments performed in each lane)

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Chapter9: Molecular Biology
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Problem 15CTQ: Transcribe and translate the following DNA sequence (nontemplate strand): 5’-ATGGCCGGTTATTAAGCA-3’
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Consider the image below. This image shows plasmid DNA isolated through exactly the same method that you used. The lanes that were untreated (TE) contain plasmid DNA, but also large amounts of smaller nucleic acids that are predicted to be RNA.

What is the experimental evidence from the gel itself that these smaller molecules are RNA? (Hint: look at the treatments performed in each lane)

This image shows an agarose gel electrophoresis experiment used to analyze nucleic acids from two plasmids, pUC18 and pBR322, under various treatments. The gel is labeled with lanes 1 through 6, each corresponding to different enzymatic treatments. 

- **Lane 1 (pUC18 RNase)**: Demonstrates treatment with RNase which degrades RNA. The presence of intact plasmid DNA is visible, indicating RNA has been selectively removed.
- **Lane 2 (pUC18 TE)**: Represents a control with TE buffer alone, showing both plasmid DNA and RNA.
- **Lane 3 (pUC18 DNase)**: Shows the effect of DNase that degrades DNA, leaving only the RNA visible.
- **Lane 4 (pBR322 RNase)**: Similar treatment as lane 1, showing plasmid DNA with RNA removed.
- **Lane 5 (pBR322 DNase)**: Illustrates the absence of DNA, highlighting the remaining RNA.
- **Lane 6 (pBR322 TE)**: Control lane showing both plasmid DNA and RNA like lane 2.

Key annotations:
- **Plasmid DNA**: Intact circles at the top of the gel, corresponding to lanes treated with either no enzyme or RNase.
- **RNA**: Located lower down in the gel, visible in lanes with DNase treatment.
- **Location of blue dye front**: Indicates the progress of electrophoresis, marked at the bottom of the gel. 

This experiment illustrates how specific enzymes can target and degrade RNA or DNA, demonstrating selective removal through the presence or absence of bands on the gel.
Transcribed Image Text:This image shows an agarose gel electrophoresis experiment used to analyze nucleic acids from two plasmids, pUC18 and pBR322, under various treatments. The gel is labeled with lanes 1 through 6, each corresponding to different enzymatic treatments. - **Lane 1 (pUC18 RNase)**: Demonstrates treatment with RNase which degrades RNA. The presence of intact plasmid DNA is visible, indicating RNA has been selectively removed. - **Lane 2 (pUC18 TE)**: Represents a control with TE buffer alone, showing both plasmid DNA and RNA. - **Lane 3 (pUC18 DNase)**: Shows the effect of DNase that degrades DNA, leaving only the RNA visible. - **Lane 4 (pBR322 RNase)**: Similar treatment as lane 1, showing plasmid DNA with RNA removed. - **Lane 5 (pBR322 DNase)**: Illustrates the absence of DNA, highlighting the remaining RNA. - **Lane 6 (pBR322 TE)**: Control lane showing both plasmid DNA and RNA like lane 2. Key annotations: - **Plasmid DNA**: Intact circles at the top of the gel, corresponding to lanes treated with either no enzyme or RNase. - **RNA**: Located lower down in the gel, visible in lanes with DNase treatment. - **Location of blue dye front**: Indicates the progress of electrophoresis, marked at the bottom of the gel. This experiment illustrates how specific enzymes can target and degrade RNA or DNA, demonstrating selective removal through the presence or absence of bands on the gel.
Expert Solution
Step 1: Answer

Removing RNA is one of the crucial processes in plasmid purification, especially after the manual isolation technique. The typical method for removing RNA from plasmid samples uses ribonuclease.

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