Answer: Specific DNA sequences.
- A RNA transcripts separated by gel electrophoresis
- B Protein bands detected using a labeled antibody probe
- C Specific DNA sequences
- D Lipids extracted and separated by thin-layer chromatography
Correct answer: C. Specific DNA sequences
Explanation: Southern blot: DNA is separated by gel electrophoresis, transferred to membrane, then hybridized with a labeled DNA probe to detect specific sequences.
Recombinant DNA technology: a gene of interest and plasmid are cut by the same restriction enzyme, ligated into a recombinant plasmid, and introduced into a host cell.
Concept context
Recombinant DNA, GMOs, PCR, CRISPR, and biotechnology applications. Growing importance in NEET.
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