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(This article was first published on <strong><a href="http://www.r-exercises.com/2017/04/29/accessing-and-manipulating-biological-databases-exercises-part-1/?utm_source=rss&utm_medium=rss&utm_campaign=accessing-and-manipulating-biological-databases-exercises-part-1"> R-exercises</a></strong>, and kindly contributed to <a rel="nofollow" href="https://www.r-bloggers.com/">R-bloggers)</a> </div>
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<p>In the exercises below we cover how we can Access and Manipulate Biological Data bases through rentrez &amp; seqinr packages </p>
<p>Install Packages<br>
rentrez<br>
seqinr</p>
<p>Answers to the exercises are available <a target="_blank" rel="nofollow" href="http://www.r-exercises.com/2017/04/29/accessing-and-manipulating-biological-databases-solutions-part-1/">here</a></p>
<p>If you obtained a different (correct) answer than those listed on the solutions page, please feel free to post your answer as a comment on that page.</p>
<p><strong>Exercise 1</strong></p>
<p>Print all the available data bases which you can access through rentrez package</p>
<p><strong>Exercise 2</strong></p>
<p>Print all the searchable terms in a database</p>
<p><strong>Exercise 3</strong></p>
<p>Display the details of any database of your choice</p>
<p><strong>Exercise 4</strong></p>
<p>Retrieve and print 10 ids of nucleotide sequences from nuccore database about Human. </p>
<p><strong>Exercise 5</strong></p>
<p>Retrieve and print 20 ids of protein sequences from protein database about Human. </p>
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<div><strong>Learn more</strong> about Data Pre-Processing in the online course <a target="_blank" rel="nofollow" href="http://www.r-exercises.com/product/r-data-pre-processing-data-management-shape-your-data/">R Data Pre-Processing &amp; Data Management – Shape your Data!</a>. In this course you will learn how to:
<ul>
<li>import data into R in several ways while also beeing able to identify a suitable import tool</li>
<li>use SQL code within R</li>
<li>And much more</li>
</ul>
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<p><strong>Exercise 6</strong></p>
<p>Create a Fasta File for a particular human protein sequence from the listed ids.</p>
<p><strong>Exercise 7</strong></p>
<p>Create a Fasta File for a particular human nucleotide sequence from the listed ids.</p>
<p><strong>Exercise 8</strong></p>
<p>Open the Nucleotide Fasta file and print the details using seqinr package.</p>
<p><strong>Exercise 9</strong></p>
<p>Open the Protein Fasta file and print the details using seqinr package</p>
<p><strong>Exercise 10</strong></p>
<p>Open the Nucleotide Fasta file and print only sequence from the created Fasta file striping all other information. </p>
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<h3>Related exercise sets:</h3>
<ol>
<li><a title="Bioinformatics Tutorial with Exercises in R (part 1)" target="_blank" rel="nofollow" href="http://www.r-exercises.com/2017/01/22/bioinformatics-lessons-in-r-1-biostrings-exercises/">Bioinformatics Tutorial with Exercises in R (part 1) </a></li>
<li><a title="Regular sequences" target="_blank" rel="nofollow" href="http://www.r-exercises.com/2015/10/23/regular-sequences/">Regular sequences </a></li>
<li><a title="Reading delimited data" target="_blank" rel="nofollow" href="http://www.r-exercises.com/2016/01/07/reading-delimited-data/">Reading delimited data </a></li>
<li><a target="_blank" rel="nofollow" href="http://www.r-exercises.com/start-here-to-learn-r/">Explore all our (>1000) R exercises</a></li>
<li><a target="_blank" rel="nofollow" href="http://www.r-exercises.com/r-courses/">Find an R course using our R Course Finder</a> directory</li>
</ol>
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