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GATE BT-2017 Answer Key | Solutions Discussion
#71
Can anyone answer this question?

At the transcription start site of a gene, any of the four nucleotides can occur with equal probability p. 
The Shannon Entropy S for this site would be? (Details in the image)

Image(s)
   
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#72
(02-14-2017, 09:45 PM)CHANDA7 Wrote: Can anyone answer this question?

At the transcription start site of a gene, any of the four nucleotides can occur with equal probability p. 
The Shannon Entropy S for this site would be? (Details in the image)
Given the fact that there is equal Probability for all 4 nucleotides, so p=0.25 or 1/4.

Now, all we have to do is fill the same into the given equation:

S= -[0.25*ln(0.25) + 0.25*ln(0.25) + 0.25*ln(0.25) + 0.25*ln (0.25)]

= -0.25[4ln(0.25)]
=-1*ln(0.25)
=-ln(0.25)
=-ln(1/4)
=-[ln(1) - ln(4)]
= -[0 - ln (2*2)]
= ln(2) +ln (2)
=0.69 + 0.69
= 1.38

I hope this is the way to go about it...
Sunil Nagpal
MS(Research) Scholar, IIT Delhi (Alumnus)
Advisor for the Biotech Students portal (BiotechStudents.com)
Computational Researcher in BioSciences at a leading MNC


Suggested Reads:
Top Biotech Companies | Top places to work
Indian Biotech Companies and Job Openings
Aiming a PhD in Top Grad School? | These are the Important Points to Consider
Careers in Biotechnology | A list of various Options
Biotechnology Competitive Exams in India
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#73
(02-15-2017, 01:56 AM)SunilNagpal Wrote:
(02-14-2017, 09:45 PM)CHANDA7 Wrote: Can anyone answer this question?

At the transcription start site of a gene, any of the four nucleotides can occur with equal probability p. 
The Shannon Entropy S for this site would be? (Details in the image)
Given the fact that there is equal Probability for all 4 nucleotides, so p=0.25 or 1/4.

Now, all we have to do is fill the same into the given equation:

S= -[0.25*ln(0.25) + 0.25*ln(0.25) + 0.25*ln(0.25) + 0.25*ln (0.25)]

= -0.25[4ln(0.25)]
=-1*ln(0.25)
=-ln(0.25)
=-ln(1/4)
=-[ln(1) - ln(4)]
= -[0 - ln (2*2)]
= ln(2) +ln (2)
=0.69 + 0.69
= 1.38

I hope this is the way to go about it...
Thank you Sunil sir.....My answer was also 1.38
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#74
A contour line joins locations having the same height above the mean sea level. The following is a contour plot of a geographical region.......(refer snapshot for details)

[Image: 88f59aaa9bdd8ef80050553130bb71f6.jpg]
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#75
(02-15-2017, 02:05 AM)RONIT SHARMA Wrote: [Image: 88f59aaa9bdd8ef80050553130bb71f6.jpg]
I've marked C
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#76
Hello everyone,

Please do write some lines of the question as well (apart from pasting the snapshot). Other students will be searching for answers by typing some lines of the question and therefore it is important to post the queries in a 'search friendly way'. Hope the point will be acknowledged...thanks and best wishes..
Sunil Nagpal
MS(Research) Scholar, IIT Delhi (Alumnus)
Advisor for the Biotech Students portal (BiotechStudents.com)
Computational Researcher in BioSciences at a leading MNC


Suggested Reads:
Top Biotech Companies | Top places to work
Indian Biotech Companies and Job Openings
Aiming a PhD in Top Grad School? | These are the Important Points to Consider
Careers in Biotechnology | A list of various Options
Biotechnology Competitive Exams in India
[+] 1 user Likes SunilNagpal's post
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#77
(02-15-2017, 02:06 AM)RONIT SHARMA Wrote:
(02-15-2017, 02:05 AM)RONIT SHARMA Wrote: [Image: 88f59aaa9bdd8ef80050553130bb71f6.jpg]
I've marked C

Can you share the link to the question paper? 
Or the source. Would help us all discuss the entire paper altogether.
Like Post Reply
#78
(02-15-2017, 02:05 AM)RONIT SHARMA Wrote: A contour line joins locations having the same height above the mean sea level. The following is a contour plot of a geographical region.......(refer snapshot for details)

[Image: 88f59aaa9bdd8ef80050553130bb71f6.jpg]
First transition is no doubt Down, and second apparently is Up till 575, followed by a down....so, Down Up Down it is.....
Sunil Nagpal
MS(Research) Scholar, IIT Delhi (Alumnus)
Advisor for the Biotech Students portal (BiotechStudents.com)
Computational Researcher in BioSciences at a leading MNC


Suggested Reads:
Top Biotech Companies | Top places to work
Indian Biotech Companies and Job Openings
Aiming a PhD in Top Grad School? | These are the Important Points to Consider
Careers in Biotechnology | A list of various Options
Biotechnology Competitive Exams in India
Like Post Reply
#79
(02-15-2017, 02:47 AM)Manoj_Shastry Wrote:
(02-15-2017, 02:06 AM)RONIT SHARMA Wrote:
(02-15-2017, 02:05 AM)RONIT SHARMA Wrote: [Image: 88f59aaa9bdd8ef80050553130bb71f6.jpg]
I've marked C

Can you share the link to the question paper? 
Or the source. Would help us all discuss the entire paper altogether.
Question paper is available on official GATE site.
Like Post Reply
#80
The genome is diploid at the end of which phase of a human mitotic cycle?
1 G2&S
2 G1&M
3 M&S
4 G1&G2
[+] 1 user Likes Akshay shinde's post
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