Bio Informatics Interview Questions
Questions Answers Views Company eMail

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

1029

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

675

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

840




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?

758

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?

903

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 1477

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

778

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,

7 19715




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 6676

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 3081

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 3759

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 6604

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 18513

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 7054

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 6696


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Un-Answered Questions { Bio Informatics }

Define perl and clustalW problem?

1197


Explain about needleman-wunsch algorithm?

1038


what is a qi number?

943


What is a DNA array?

769


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

1154






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 how much?

954


NLO : RPS : : ? : ZXA

965


How can we find the direction of an nucleotide substitution, for example; C to T or T to C?

1129


what is the principle involved in Biometry?

961


How to find a sequence of dna molecule?

827


How to Insert Genomic DNA into yeast ?

747


How the Algorithm works?

753


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

840


How long will a train 100m long traveling at 72kmph take to overtake another train 200m long traveling at 54kmph?

2058


What is Phantom Gene Sequence?

1151