CSIR NET Question Papers Life Sciences

Will you please provide me the Model Question Papers for CSIR NET Exam for Life Sciences?

[Kiran Chandar]

As you are looking for the Model Question Papers for CSIR NET Exam for Life Sciences so here it is given below:

LIFE SCIENCES
PAPER II
1. a) Draw a graph that will represent the following equation:
dA = kA
dt (5)
b) Describe a method to determine surface area of a leaf without using any
instrument.
(5)
c) Water is often contaminated by a variety of ionic impurities. What is the
best method to determine purity of a sample of water?
(5)
d) You have to test if ponds A, B and C differ significantly in their primary
productivity. What statistical test should be applied to your data? Justify your
choice of the test.
(5)
2. The extensive sequences (Gly-X-Pro)n or (Gly-X-Hpro)n stabilize the collagen
triple-helix, in which X is any amino acid.
(i) Why must Gly be present in every third residue?
(5)
(ii) What are the principal bonds, which are responsible for holding three
helical strands together in the superhelix?
(4)
(iii) How does each strand of the collagen helix differ from an α-helix in terms
of structural characteristics?
(3)
3. (a) An experiment was done to determine the effect of compound Y on the
biochemical reaction A + B → C. It was found that in the presence of Y,
very little, if any, product C was formed. However, on increasing the
concentration of A, C could be detected. Explain the effect of Y on the
reaction.
(2)
(b) Describe an approach by which secondary structure of RNA molecules
can be verified.
(5)
(c) How would you determine the aggregation state and shape of a biomacro-
molecule in solution?








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