Free Practice Quiz Question List

8 Basic Bioinformatics Workflows Online Quiz Questions

Use this free practice quiz with 20 questions to review 8 Basic Bioinformatics Workflows, test your knowledge, and prepare for your next test or exam.

20 questions

Choose one

1 point

You need to retrieve protein sequences together with their annotations for a protein-focused analysis. Which database is the most directly suited to this purpose?

A
The Sequence Read Archive (SRA)
B
UniProtKB
C
GenBank
D
RefSeq

Choose one

1 point

Two sequences are expected to correspond across their full lengths, and you want to compare them end to end. Which alignment approach should you choose?

A
Global alignment
B
Local alignment
C
A protein-to-protein database search
D
Read-quality filtering

Choose one

1 point

You are planning an analysis of publicly available sequencing reads and need to identify suitable runs before retrieving the reads. Which resource is specifically described as storing sequencing data?

A
UniProtKB
B
RefSeq
C
The Sequence Read Archive (SRA)
D
GenBank

Choose one

1 point

A protein-analysis workflow receives a FASTA file that may contain a nucleotide sequence or a malformed record. Which initial validation step best addresses both possibilities?

A
Accept the file if its sequence has a plausible length; FASTA headers are optional.
B
Check only that the file extension says .fasta.
C
Treat any letters as valid protein symbols if a header is present.
D
Check that each sequence begins with a > header and that its symbols match the expected sequence type.

Choose one

1 point

Two protein searches report the same E-value for matches, but the searches used databases of different sizes. What is the most appropriate interpretation of this comparison?

A
The E-value is independent of database size, so database choice can be ignored.
B
Database size can affect the E-value, so it should be interpreted with other evidence and the search context.
C
The E-value proves that the match has the same biological function as the query.
D
The E-value replaces the need to inspect query coverage.

Choose all

1 point

A colleague wants to make a bioinformatics analysis repeatable. Which items should be recorded or preserved? Select all that apply.

A
Record database names, accessions, retrieval dates, and relevant release or version information.
B
Record only the final biological conclusion; input details are not needed.
C
Record software names and versions, parameters, and filtering or preprocessing steps.
D
Preserve relevant intermediate outputs and logs as well as the final results.

Choose all

1 point

A researcher is evaluating candidate matches for an unknown protein. Which kinds of evidence are relevant to assessing how well a candidate supports a functional hypothesis? Select all that apply.

A
Query coverage, since a strong match across most of the protein differs from one limited to a short region.
B
Percentage identity and alignment score, considered alongside other evidence.
C
The rank of the top result alone, which establishes that the query has the same function.
D
Annotation evidence and biological context for well-supported candidate records.

True or false

1 point

Another person can repeat a documented database search using the same procedure, yet obtain different results later because the database has changed.

A
True
B
False

True or false

1 point

A top database search result or a high annotation score proves that an unknown protein has the same function as the matched protein.

A
True
B
False

Written response

1 point

An accession is written as NM_000000.2. What does the suffix .2 specify?

Written response

1 point

Sequence similarity supports a cautious interpretation of a protein's possible role. What kind of conclusion does it support rather than definitive proof of function?

Fill in the blank

1 point

A reliable bioinformatics workflow connects the biological to a suitable and , then supports a biological conclusion.

Fill in the blank

1 point

For read data, retain sample identifiers and metadata linking each file to its biological . Comparisons between conditions must also account for biological .

Open ended

1 point

A sequencing analysis reports a difference between two biological conditions. Explain why this result alone does not establish a biological mechanism, and identify important factors that should guide interpretation of the reported difference.

Choose one

1 point

A sequence file is intended to contain protein data in FASTA format. Which initial check best validates that the input is suitable for the workflow?

A
Confirm that the sequence has the expected biological length, then infer its type from that alone.
B
Check that the record begins with a > header and that its symbols are valid for the intended sequence type.
C
Run a local alignment and use its score to determine whether the record is formatted correctly.
D
Replace the header with a database accession before checking the sequence symbols.

Choose one

1 point

You retrieve sequencing runs for two study conditions, but the read files are not clearly labeled. What should you establish before comparing the conditions?

A
Rename all files with the name of the reference genome.
B
Combine the reads into one file so that sample labels are no longer needed.
C
Identify the sample metadata that links each read file to its biological condition.
D
Use the number of reads in each file as a substitute for condition labels.

Written response

1 point

Two sequences are expected to correspond across their full lengths, and you want to compare them end to end. Which alignment strategy is appropriate?

Choose one

1 point

Two protein-database searches produce hits with the same alignment score, but the databases differ greatly in size. Why should you avoid treating their E-values as automatically equivalent evidence?

A
Database size changes the query sequence, which changes the meaning of the alignment score.
B
Database size can affect the E-value, so the scores should not be interpreted as if the search contexts were identical.
C
E-values depend only on percentage identity, so database size is irrelevant.
D
A larger database always makes an alignment score lower.

Written response

1 point

You have an amino-acid query and want to search a protein database for similar sequences. What is the name of the protein-to-protein similarity search tool described in the material?

True or false

1 point

True or false: If a sequencing analysis reports a difference associated with a condition, that result alone establishes the biological mechanism causing the difference.

A
True
B
False