From f088f31e0c50bac6c2f394cc50b839298d577c4c Mon Sep 17 00:00:00 2001
From: ElnazAmanzadeh <30586852+ElnazAmanzadeh@users.noreply.github.com>
Date: Sun, 13 Oct 2024 10:01:49 +0330
Subject: [PATCH] Update 02-workflow.md

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 _episodes/02-workflow.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/_episodes/02-workflow.md b/_episodes/02-workflow.md
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--- a/_episodes/02-workflow.md
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@@ -14,6 +14,16 @@ keypoints:
 - "scRNA-seq requires much pre-processing before analysis can be performed."
 ---
 
+:::::::::::::::::::::::::::::::::::::::  challenge
+
+## Challenge
+
+Download the latest mouse transcriptome fasta file from GENCODE. What do the entries look like? Tip: to read the file into R, consider the `readDNAStringSet()` function from the `Biostrings` package.
+  
+::::::::::::::::::::::::::::::::::::::::::::::::::
+
+
+
 # scRNA-Seq Experimental Workflow
 
 Single cell RNA sequencing (scRNA-seq) is a novel technique for extracting more detailed information from genome.