Class 1, Exercise 2 - Prog. for Bioinformatics IIWelcome to Intro. to Prog. for 
Bioinformatics II
Class 1, Exercise 2
We will work with Aminoacids in this exercise. Write just one Perl program 
called 'Aminoacids' to do all of the following. Please DO NOT write five 
separate programs.
1. Declare 5 scalar variables called $Ala, $Lys, $Glu, $Met and $Ser. Define 
them with the values 'A', 'K', 'E', 'M' and 'S' respectively. Print these 
scalars one per line like this: 

$Ala: A
$Lys: K
...
$Ser: S


2. Define an array called @aminoacids that will contain the five aminoacids, 
namely, 'Alanine', 'Lysine', 'Glutamic', 'Methionine' and 'Serine'. Use the qw 
quoting method. Print this array like this: 

Aminoacids are: Alanine Lysine Glutamic Methionine Serine 


3. Define a hash called %code_1to3 with 2 keys, 'A' and 'K' and their values, 
'Ala' and 'Lys' respectively. Now add 3 more keys to this hash which are, 'E', 
'M' and 'S' whose values are 'Glu', 'Met' and 'Ser'. Print all the keys and 
values of this hash, one line at a time like this: 

Key: A (followed by 2 tabs) Value: Ala
...
Key: S (followed by 2 tabs) Value: Ser


4. Define a hash called %code_3to1 with 3 keys, 'Ala', 'Lys' and 'Glu' and their 
values, 'A', 'K', and 'E' respectively. Now add 2 more keys to this hash which 
are, 'Met' and 'Ser' whose values are 'M' and 'S'. Print all the keys and values 
of this hash, one line at a time like this: 

Key: Ala (followed by 2 tabs) Value: A
...
Key: Ser (followed by 2 tabs) Value: S


5. Define a new hash called %aa. Use the scalars created in step 1 as the keys 
for this hash. Use the array elements created in step 2 as the corresponding 
values to these keys. Print all the keys and values of this hash, one line at a 
time like this: 

Key: A (followed by 2 tabs) Value: Alanine
Key: K (followed by 2 tabs) Value: Lysine
...
Key: S (followed by 2 tabs) Value: Serine