Bio Informatics Interview Questions
Questions Answers Views Company eMail

What does the ultrametric property of a tree tell us about the evolutionary process?

1258

What is the difference in terms of connectivity between a scale free network and random network?

791

What two possibilities are there to describe how gene fragments may have evolved?

963




Suppose you used the NCBI Blast server to look for a match to a fruit-fly gene. Suppose further that the best alignment contained this section of an alignment: Hit from database: XXXXXXXXXXXXXXNFSTSQ User sequence: SLEAEAAPASISPSNFSSSQ What do the Xs signify?

874

Suppose the Blast search returned 100 hits. Of these, 17 were false positives and we knew that there were 165 sequences in the database which should have returned a hit with our sequence. How many false negatives were there, and what is the sensitivity and selectivity of Blast in this instance?

1084

If a match from a sequence database search is reported to have an E-value of 0.0, should it be considered highly insignificant or highly significant?

1 1637

What is the idea behind ?weighting? sequences in the package CLUSTAL W for multiple alignment? How are these weights calculated?

880

When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts a) In the backward direction on the front wheel and in the forward direction on the rear wheel. (b) In the forward direction on the front wheel and in the backward direction on the rear wheel. (c) In the backward direction on both the front and rear wheels. (d) In the backward direction on both the front and rear wheels.

IIT, IIM, Wipro, College School Exams Tests, JGK,

8 22481




A certain radioactive element A, has a half life = t seconds. In (t/2) seconds the fraction of the initial quantity of the element so far decayed is nearly (a) 29% (b) 15% (c) 10% (d) 45%

Wipro,

1 7665

Which of the following plots would be a straight line ? (a) Logarithm of decay rate against logarithm of time (b) Logarithm of decay rate against logarithm of number of decaying nuclei (c) Decay rate against time (d) Number of decaying nuclei against time

Wipro,

1 3311

A radioactive element x has an atomic number of 100. It decays directly into an element y which decays directly into element z. In both processes a charged particle is emitted. Which of the following statements would be true? (a) y has an atomic number of 102 (b) y has an atomic number of 101 (c) z has an atomic number of 100 (d) z has an atomic number of 101

Wipro,

1 4062

If the sum of the roots of the equation ax2 + bx + c=0 is equal to the sum of the squares of their reciprocals then a/c, b/a, c/b are in (a) AP (b) GP (c) HP (d) None of these

Wipro,

1 7131

A man speaks the truth 3 out of 4 times. He throws a die and reports it to be a 6. What is the probability of it being a 6? (a) 3/8 (b) 5/8 (c) 3/4 (d) None of the above

Wipro, TCS, Microsoft, HDFC, MNC,

11 19606

If cos2A + cos2B + cos2C = 1 then ABC is a (a) Right angle triangle (b) Equilateral triangle (c) All the angles are acute (d) None of these

Wipro,

1 8422

Image of point (3,8) in the line x + 3y = 7 is (a) (-1,-4) (b) (-1,4) (c) (2,-4) (d) (-2,-4)

Wipro, 3i Infotech,

1 6993


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Un-Answered Questions { Bio Informatics }

Is there is best online Training for Bioinformatics

1325


Define perl and clustalW problem?

1329


How to identify common acc.numbers from among a set of files ?

1671


Suppose the Blast search returned 100 hits. Of these, 17 were false positives and we knew that there were 165 sequences in the database which should have returned a hit with our sequence. How many false negatives were there, and what is the sensitivity and selectivity of Blast in this instance?

1084


Draw the E-R diagram for the database of a departmental store having the following relational database scheme Employees(e-no, address) Department(d-name) work-n(e-no, d-name) Looking-after(d-name, e-no) Item (item-no, brand-name, model-no, cost-price, sale-price)

11003






Suppose you used the NCBI Blast server to look for a match to a fruit-fly gene. Suppose further that the best alignment contained this section of an alignment: Hit from database: XXXXXXXXXXXXXXNFSTSQ User sequence: SLEAEAAPASISPSNFSSSQ What do the Xs signify?

874


How to predict the function of a gene (product)?

919


What is the idea behind ?weighting? sequences in the package CLUSTAL W for multiple alignment? How are these weights calculated?

880


What are the main differences between parsimony,distance and likelihood-based algorithms?

1038


What is the criteria for LTQ (LC-MS/MS) SEQUEST search?

1285


What is the product of the irrational roots of the equation (2x-1)(2x-3)(2x-5)(2x-7)=9?

1697


How to find a sequence of dna molecule?

953


What are the current challenges in the Pharmaceutical and biotechnology sectors?

1108


What is a DNA array?

920


can u give me an example of a project you were involved with that illustrates your interest and skills in bringing people together?

963