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DNA Questions
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def binding_locations(strA, strB):
The first parameter represents a strand of DNA. The second parameter is one strand from a recognition sequence. Return a list of all the indices where the recognition sequence appears in the DNA strand. (These are the restriction sites.) For example, if the DNA palindrome appears at the beginning of the DNA strand, then 0 would be one of the items in the returned list. Only look from left to right; don't reverse the first parameter and look backwards. str.find will probably be helpful.
Example:
the first string is 'AAAAAAAAGGTTCCGTCGAAAA' for example and the second string is 'AAAA'
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def match_enzymes(str, list, list):
The first parameter is a DNA strand; the second is a list of strings that are restriction enzyme names; and the third is a list of recognition sequences that are matched by the corresponding restriction enzymes. The first list might be ['BamHI', 'TaqI'] and the second list might be ['GGATCC', 'TCGA'], for example. Return a list of tuples where the first item of each tuple is the name of a restriction enzyme and the second item is the list of indices (in the DNA strand) of the restriction sites that the enzyme cuts.
Example:
match_enzymes("TCGAGGATCC", ['BamHI', 'TaqI'], ['GGATCC', 'TCGA'])
return [('BamHI', [4]), ('TaqI', [0])]
---------------------------------------------------------
def one_cutters(str, list, list):
The first parameter is a DNA strand; the second is a list of strings that are restriction enzyme names; and the third is a list of recognition sequences that are matched by the corresponding restriction enzymes. Return a list of tuples representing the 1-cutters for that strand. The first item of each tuple is the name of a restriction enzyme and the second item is the index (in the DNA strand) of the one restriction site that the enzyme cuts.
This function is the same as the previous match_enzymes function but instead, it will return the index of where the first cut of the DNA strand occurs.
Please help me out.
Thanks
The first parameter represents a strand of DNA. The second parameter is one strand from a recognition sequence. Return a list of all the indices where the recognition sequence appears in the DNA strand. (These are the restriction sites.) For example, if the DNA palindrome appears at the beginning of the DNA strand, then 0 would be one of the items in the returned list. Only look from left to right; don't reverse the first parameter and look backwards. str.find will probably be helpful.
Example:
the first string is 'AAAAAAAAGGTTCCGTCGAAAA' for example and the second string is 'AAAA'
---------------------------------------------
def match_enzymes(str, list, list):
The first parameter is a DNA strand; the second is a list of strings that are restriction enzyme names; and the third is a list of recognition sequences that are matched by the corresponding restriction enzymes. The first list might be ['BamHI', 'TaqI'] and the second list might be ['GGATCC', 'TCGA'], for example. Return a list of tuples where the first item of each tuple is the name of a restriction enzyme and the second item is the list of indices (in the DNA strand) of the restriction sites that the enzyme cuts.
Example:
match_enzymes("TCGAGGATCC", ['BamHI', 'TaqI'], ['GGATCC', 'TCGA'])
return [('BamHI', [4]), ('TaqI', [0])]
---------------------------------------------------------
def one_cutters(str, list, list):
The first parameter is a DNA strand; the second is a list of strings that are restriction enzyme names; and the third is a list of recognition sequences that are matched by the corresponding restriction enzymes. Return a list of tuples representing the 1-cutters for that strand. The first item of each tuple is the name of a restriction enzyme and the second item is the index (in the DNA strand) of the one restriction site that the enzyme cuts.
This function is the same as the previous match_enzymes function but instead, it will return the index of where the first cut of the DNA strand occurs.
Please help me out.
Thanks
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Join Date: Jul 2009
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#3 31 Days Ago
hi
after reading the specification like 5 times here's what I came up with
first part:
second part:
I couldn't understand the specification for the third part if you could provide an example I'll try to help
after reading the specification like 5 times here's what I came up with
first part:
Python Syntax (Toggle Plain Text)
second part:
Python Syntax (Toggle Plain Text)
I couldn't understand the specification for the third part if you could provide an example I'll try to help
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Junior Poster
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#4 31 Days Ago
P.S I tested this using your examples and here are my results:
Python Syntax (Toggle Plain Text)
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#5 30 Days Ago
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Originally Posted by mms6 
anyone plz help me out here
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Originally Posted by masterofpuppets
hi
after reading the specification like 5 times here's what I came up with
You shouldn't be spoon feeding people looking for us to do their homework for them. Even though you provided good code, it doesn't help the OP at all because he's obviously going to just copy-paste your solutions and turn them in exactly in the same manner as he copy-pasted his assignment and posted it here.
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#6 27 Days Ago
If the OP has not even given an example of what has been tried, I would prod them to at least give an idea of how they would approach the solution. Then you can give hints how to proceed.
Another way to help is to give a related example that would be a part of the solution. At least this way the OP gets involved in the quest to solve the problem.
If you had fun with the challenge to solve the problem, be a little patient and don't post your solution right away.
Another way to help is to give a related example that would be a part of the solution. At least this way the OP gets involved in the quest to solve the problem.
If you had fun with the challenge to solve the problem, be a little patient and don't post your solution right away.
May 'the Google' be with you!
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