Write a shell script which can read a DNA sequence

Subjects List
Database (48)
Accounting (39)
Economics (34)
Finance (54)
Programming (122)
Management (69)
Marketing (25)
Report Writing (52)
Engineering (79)
Statistics (39)
Business Studies(45)
Case Studies (15)
Networking (26)
UML (9)
Science (23)
Nursing (11)
MATLAB (17)
Psychology (6)
Math (20)
Data Structure (9)
Python (15)
HRM (25)
IT (21)
Computer Science (57)
Law (4)
Essay (3)
Data Analysis (2)
Big Data (3)
Philosophy (2)
History (1)