Problem DNA: Subsequence markingA common task in dealing with DNA sequences is searching for particular substrings within longer DNA sequences.Write a function mark_dna that takes as parameters a DNA sequence to search, and a shorter target sequence to find within the longer sequence. Have this function return a new altered sequence that is the original sequence with all non-overlapping occurrences of the target surrounded with the characters >> and <<.Hints:● String slicing is useful for looking at multiple characters at once.● Remember that you cannot modify the original string directly, you’ll need to build a copy.Start with an empty string and concatenate onto it as you loop.Constraints:● Don't use the built-in replace string method. All other string methods are permitted.>>> mark_dna('atgcgctagcatg', 'gcg') 'at>>gcg<<ctagcatg' >>> mark_dna('atgcgctagcatg', 'gc') 'at>>gc<<>>gc<<ta>>gc<<atg' >>> mark_dna('aatttctactgcag', 'ttt') 'aa>>ttt<<ctactgcag' >>> mark_dna('aatctctactctgcag', 'tct') 'aa>>tct<<ctac>>tct<<gcag'

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Answered: Problem DNA: Subsequence marking A…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Problem DNA: Subsequence marking
A common task in dealing with DNA sequences is searching for particular substrings within longer DNA sequences.

Write a function mark_dna that takes as parameters a DNA sequence to search, and a shorter target sequence to find within the longer sequence. Have this function return a new altered sequence that is the original sequence with all non-overlapping occurrences of the target surrounded with the characters >> and <<.

Hints:

● String slicing is useful for looking at multiple characters at once.
● Remember that you cannot modify the original string directly, you’ll need to build a copy.

Start with an empty string and concatenate onto it as you loop.

Constraints:

● Don't use the built-in replace string method. All other string methods are permitted.

>>> mark_dna('atgcgctagcatg', 'gcg') 'at>>gcg<<ctagcatg' >>> mark_dna('atgcgctagcatg', 'gc') 'at>>gc<<>>gc<<ta>>gc<<atg' >>> mark_dna('aatttctactgcag', 'ttt') 'aa>>ttt<<ctactgcag' >>> mark_dna('aatctctactctgcag', 'tct') 'aa>>tct<<ctac>>tct<<gcag'

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