Question

Which of the following is incorrect about ENTREZ?

(a) There is no simple way to find the correct sequence without manually checking the information provided in each sequence, but this usually takes longer time

(b) Before leaving ENTREZ, it is often useful to check for sequence database entries that are similar to the one of interest, called “neighbors” by ENTREZ

(c) The expanded query searches other database entries of interest, such as the same protein in another organism, a large chromosomal sequence that includes the gene, or members of the same gene family

(d) While visiting the site, note that ENTREZ has been adapted to search through a number of other biological databases, and also through Medline, and these searches are available from the initial ENTREZ Web page

This question was posed to me in quiz.

My question comes from Using the Database Access Program ENTREZ topic in chapter Collecting & Storing Sequences in Laboratory of Bioinformatics

Answer 1

Right option is (a) There is no simple way to find the correct sequence without manually checking the information provided in each sequence, but this usually takes longer time

To explain: Opposite to what is mentioned in option a, this takes shorter time. It is important to look through the sequences to locate the one intended. There may be several different copies of the sequence because it may have been sequenced from more than one organism, or the sequence may be a mutant sequence, a particular clone, or a fragment.