diff --git a/Excercises/Python_course_exercises_A.ipynb b/Excercises/Python_course_exercises_A.ipynb
new file mode 100644
index 0000000000000000000000000000000000000000..5860d02511e137b51a3c979f48f3cd5c91d8b740
--- /dev/null
+++ b/Excercises/Python_course_exercises_A.ipynb
@@ -0,0 +1 @@
+{"nbformat":4,"nbformat_minor":0,"metadata":{"colab":{"name":"Python_course_2021_exercises_A.ipynb","provenance":[],"collapsed_sections":[],"authorship_tag":"ABX9TyOtXoTh9bpM3+wk3vCpa80j"},"kernelspec":{"name":"python3","display_name":"Python 3"}},"cells":[{"cell_type":"markdown","metadata":{"id":"D9wuSivclqKR"},"source":["# Python course 2021 - Exercises A"]},{"cell_type":"markdown","metadata":{"id":"8nq-mSErlstG"},"source":["## Part1 - Variables"]},{"cell_type":"markdown","metadata":{"id":"Dc_9QuyRmFB0"},"source":["\r\n","\r\n","---\r\n","\r\n","\r\n","1.1) Save 3.14159265359 in a variable of type float!"]},{"cell_type":"code","metadata":{"id":"t0cbYO8ymZZZ"},"source":[""],"execution_count":null,"outputs":[]},{"cell_type":"markdown","metadata":{"id":"8GnX41irmahZ"},"source":["\r\n","\r\n","---\r\n","\r\n","1.2) Convert variable from float to integer!\r\n","\r\n","\r\n","\r\n"]},{"cell_type":"code","metadata":{"id":"IF5LB4a1mrIq"},"source":[""],"execution_count":null,"outputs":[]},{"cell_type":"markdown","metadata":{"id":"Wpg5yXPMmx9S"},"source":["\r\n","\r\n","---\r\n","\r\n","1.3) Convert variable back! What happens?"]},{"cell_type":"code","metadata":{"id":"MKBxedZxm4Zz"},"source":[""],"execution_count":null,"outputs":[]},{"cell_type":"markdown","metadata":{"id":"tadPKecSm4rq"},"source":["\r\n","\r\n","---\r\n","1.4) Convert variable type to string!\r\n"]},{"cell_type":"code","metadata":{"id":"1iqoYMyKm47q"},"source":[""],"execution_count":null,"outputs":[]},{"cell_type":"markdown","metadata":{"id":"wpSIghwHm5Ej"},"source":["\r\n","\r\n","---\r\n","\r\n","1.5) Save 'Python' in a string variable!"]},{"cell_type":"code","metadata":{"id":"N7XlJWFbnGAz"},"source":[""],"execution_count":null,"outputs":[]},{"cell_type":"markdown","metadata":{"id":"fBL218wOnGLa"},"source":["\r\n","\r\n","---\r\n","1.6) Convert variable type to float! What happens?\r\n"]},{"cell_type":"code","metadata":{"id":"jWenjrpGnLMi"},"source":[""],"execution_count":null,"outputs":[]},{"cell_type":"markdown","metadata":{"id":"FB_ZFKiNnLVj"},"source":["\r\n","\r\n","---\r\n","\r\n","\r\n","1.7) What is a pitfall in regards to division when working with int/float?"]},{"cell_type":"markdown","metadata":{"id":"I4ZTk_1wnVYq"},"source":["---type your answer here (double click)---"]},{"cell_type":"markdown","metadata":{"id":"O5qjeyUhniCs"},"source":["## Part2 - Functions"]},{"cell_type":"markdown","metadata":{"id":"luO5CdEcnxrz"},"source":["Primer: 'ATGCCATGCATTCGACTACG'"]},{"cell_type":"markdown","metadata":{"id":"91zd9CgHn4f8"},"source":["\r\n","\r\n","---\r\n","\r\n","\r\n","2.1) Calculate length of primer and print it!"]},{"cell_type":"code","metadata":{"id":"k3FggWgun-cW","executionInfo":{"status":"ok","timestamp":1611064497629,"user_tz":-60,"elapsed":575,"user":{"displayName":"Katharina Sielemann","photoUrl":"","userId":"00960067943696917992"}}},"source":[""],"execution_count":1,"outputs":[]},{"cell_type":"markdown","metadata":{"id":"vilS9kFun-o6"},"source":["\r\n","\r\n","---\r\n","\r\n","2.2) Get number of 'G's and print it!"]},{"cell_type":"code","metadata":{"id":"qTtPu44JoFWb"},"source":[""],"execution_count":null,"outputs":[]},{"cell_type":"markdown","metadata":{"id":"RhxbY3ReoFeE"},"source":["\r\n","\r\n","---\r\n","2.3) Write a function to analyze the nucleotide composition of a primer and print it!\r\n"]},{"cell_type":"code","metadata":{"id":"hPT9ciehoNvl"},"source":[""],"execution_count":null,"outputs":[]},{"cell_type":"markdown","metadata":{"id":"nxYFsZTfoN5y"},"source":["\r\n","\r\n","---\r\n","2.4) Is it a suitable primer? Why (not)?\r\n"]},{"cell_type":"markdown","metadata":{"id":"YNfwCwHxoT6S"},"source":["---type your answer here (double click)---"]}]}
\ No newline at end of file