Question

1. what is the purpose of gel electrophoresis?
2. what is the purpose of restriction enzymes?
3. base on the data from the lab activity, which missing person is most likely a match to the skeletal remains found in the desert?

Explanation:

Question 1

Gel electrophoresis is a technique used in molecular biology (a subfield of Biology) to separate macromolecules like DNA, RNA, or proteins based on their size, charge, and shape. The gel provides a matrix through which these molecules migrate under an electric field. Smaller molecules move faster and farther than larger ones, allowing for separation and analysis, such as in DNA fingerprinting or studying protein mixtures.

Restriction enzymes (also called restriction endonucleases) are enzymes in molecular biology (Biology subfield). They recognize specific DNA sequences (restriction sites) and cut the DNA at or near those sites. This is crucial for recombinant DNA technology, where they are used to cut DNA from different sources (e.g., a gene of interest and a plasmid vector) so that the gene can be inserted into the vector to create recombinant DNA. They also help in DNA mapping and analysis.

To determine the missing person match for skeletal remains, techniques like DNA analysis (using gel electrophoresis, restriction enzymes, PCR, etc.) are used. By comparing the DNA profile (e.g., RFLP or STR profiles) of the skeletal remains with the DNA profiles of missing persons (or their relatives), we can identify a match. The missing person whose DNA profile (from samples like blood, saliva of relatives or the missing person’s pre - disappearance samples) shows the highest similarity (matching bands in gel electrophoresis, matching STR loci, etc.) to the skeletal remains’ DNA is the most likely match. However, without the lab activity data (like DNA profiles of skeletal remains and missing persons), a specific name can't be given, but the process involves DNA - based comparison.

Answer:

The purpose of gel electrophoresis is to separate macromolecules (like DNA, RNA, or proteins) based on their size, charge, and shape, enabling analysis (e.g., DNA fingerprinting, protein/ nucleic acid analysis).

Question 2