Quiz

Congratulations! You have now completed the practical

Using the answers that you recorded during the practical, now answer the following questions. This is only for your own benefit to ensure you have done all the stages correctly and understand what you are doing. These answers are not recorded.

1. A primary database always contains:
Raw data (typically sequences or structures for proteins or nucleic acids)
Detailed annotations
Cross links to other databases

2. Which of the following is NOT a primary database
Genbank
PRINTS
EMBL-ENA

3. An e-value resulting from a sequence database search indicates:
The score for the match
The chance of seeing this match at random
The expected number of hits with at least this score in the current database

4. Which one of the following statements is false?
You should always treat results of sequence databases with caution
Sequence databases always contain reliable information
'nr' is a non-redundant database

5. Which of the following blast versions would be used for a search of a DNA sequence against a DNA database?
blastx
blastn
blastp

6. Which of the following blast versions would be used for a search of a protein sequence against a protein database?
blastx
blastn
blastp

7. Which of the following systems would be most useful for performing a search of text annotations?
Glimpse
Blast
FASTA

8. Which of the following statements is false?
A secondary database usually contains characteristic information extracted from related proteins
A secondary database may contain detailed annotation of protein families
A secondary database always contains raw sequence or structure data

9. Which of the following is NOT a secondary database
Genbank
Prosite
InterPro

10. Which of the following statements about InterPro is true?
It can only be searched using sequences
It can only be searched using text
It can be searched using either sequences or text

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