CSIR Life Science Sample Questions (Part 3 of 10)

  1. Sympatric population shows

    1. Population whose geographic ranges overlap

    2. Population showing similar adaptations

    3. Population showing similar adaptations

    4. Population at verge of extinction

  2. A particular gene has only two alleles, W and w. The proportion of the W allele in a particular population is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the ww genotype

    1. 0.04

    2. 0.8

    3. 0.64

    4. 0.32

  3. The mimicry in which mimic is defenseless but has Antipredatory marks like the model which has defense against predators known as:

    1. Batesian Mimicry

    2. Mullerian Mimicry

    3. Both a & b

    4. None of the above

  4. Yeast Artificial chromosome (YAC) is used for

    1. cloning large segments of DNA

    2. cloning only yeast genomic sequences

    3. cloning of only cDNA sequences

    4. all DNA except plant DNA sequences

  5. Recombinant live attenuated vaccine against hepatitis B was prepared from

    1. Plasma of chronically infected individual

    2. Recombinant yeast expressing hepatitis B surface antigen

    3. Recombinant vaccinia virus expressing hepatitis B surface antigen

    4. Transgenic plants expressing Hepatitis B surface antigen

  6. Dithiothreitol and merceptoethanol is used because

    1. Both reduces disulfide linkages

    2. One reduces and the other oxidizes disulfide linkages

    3. Both oxidizes disulfide linkages

    4. None of the above

  7. Tm of primer is calculated by using formula Tm =

    1. 4 (G + C) & 2 (A + T)

    2. 2 (G + C) & 4 (A + T)

    3. 2 (G + C) + 2 (A + T)

    4. None of the above

  8. TEM is used to study

    1. Internal structure

    2. Surface molecules

    3. Both a and b

    4. None of the above