Blog of Andrés Aravena

Homework 1

07 October 2023. Deadline: Thursday, 19 October, 12:00. by Andrés Aravena, Ph.D.

Last class we showed how to look for specific sequences in NCBI using advanced search. This homework aim is to practice this kind of search. For each of the following questions, please describe the advanced query used to answer it, the database used, and the number of results.

For example, if the question is “all keratin proteins in Homo sapiens” corresponds to the query keratin[Protein Name] AND "homo sapiens"[Organism] in the Protein database, and results in 5 answers. Notice that the answer is different if you instead ask keratin AND "homo sapiens".

We do not want to see the all the results, only the number of results, the database name, and the query.

Please write a document (either Microsoft Word™, Google Docs, or Markdown) and fill the answers below each question. Send your answers directly to


Deadline: Thursday, 19 October, 12:00.

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