Bio Informatics Interview Questions
Questions Answers Views Company eMail

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

1092

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

717

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

877




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?

806

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?

943

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 1531

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

816

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 20818




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 6956

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 3168

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 3868

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 6842

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 18938

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 7543

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 6798


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Un-Answered Questions { Bio Informatics }

NLO : RPS : : ? : ZXA

1029


What is the secondary structure of intron ?

900


How to find a sequence of dna molecule?

887


How do ESTs work?

820


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

852






How the Algorithm works?

792


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

954


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

1092


Can DeCypher be used for protein struc-ture modeling?

958


What is C-compliator?

1020


What is a DNA array?

835


An electron is injected into a region of uniform magnetic flux density with the components of velocity parallel to and normal to the flux. What is the path of the electron?

1005


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

717


Is there is best online Training for Bioinformatics

1239


How to run DOCK 6 using cygwin?

4522