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CSIR NET Life Sciences Question Paper: June 2015: with Answer Key and Explanations: Part I


NET life Sciences June 2015 Question Paper

Structure of Eukaryotic Cilia (Image Source Wikipedia)

CSIR/JRF/NET: Life Sciences, June 2015 (I)
COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH (CSIR) & UGC

(Original Question Paper)
PART: B (Questions 21 – 40)

(21).  A 1% (w/v) solution of a sugar polymer is digested by an enzyme (20ug, MW = 200,000). The rate of monomer sugar (MW = 400) liberated was determined to have a maximal initial velocity of 100 mg formed/ min. The turnover number (min -1) will be:

a.       5 X 10 4
b.      2.5 X 10 -2
c.       4.0 X 10 -6
d.      2.5 X 10 5

(22).  In an alpha helical polypeptide, the backbone hydrogen bonds are between

a.       NH of n and CO of n + 4 amino acids
b.      CO of n and NH of n + 3 amino acids
c.       CO of n and NH of n + 4 amino acids
d.      NH of n and CO of n + 3 amino acids

(23).  The following are three single stranded DNA sequences that form secondary structures.

(a). ATTGAGCGATCAAT
(b). ATTGAGCGATATCAAT
(c). AGGGAGCGATCCCT

Based on their stability, which one is correct?

a.       (a) = (b) = C
b.      (c) > (a) > (b)
c.       (b) > (c) = (a)
d.      (b) > (c) > (a)

(24).  Which of the following is not a part of pyruvate dehydrogenase enzyme complex in glycolysis pathway?

a.       Pyruvate dehydrogenase
b.      Dihydrolipoyl transferase
c.       Dihydrolipoyl dehydrogenase
d.      Dihydrolipoyl oxidase

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