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Exam Details

LIFE SCIENCE PART B (DECEMBER 2017) 2017

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Questions 50
Duration 180 mins
Package CSIR NET & SET - Previous Year Papers

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Hard 26 52%
Medium 23 46%
Easy 1 2%

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Multiple Choices 50 100%

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1
2017 · Unclassified
LIFE SCIENCE PART B (DECEMBER 2017) 2017
Choose the correct statement from the following:
A
Disulfide bonds in a 20-residue peptide can be formed only if the cysteines are adjacent to each other.
B
The amino acid isoleucine has only one chiral centre.
C
Both bases and sugar contribute to the chirality of nucleic acids.
D
The pI of aspartic acid is less than that of glutamic acid.
2
2017 · Unclassified
LIFE SCIENCE PART B (DECEMBER 2017) 2017
Indicate the INCORRECT statement from the following:
A
Allosteric enzymes function through reversible non-covalent binding of allosteric modulators or effectors.
B
Monoclonal antibodies that catalyze hydrolysis of esters or carbonates can be produced.
C
Enzymes are not inhibited irreversibly by ___heavy metals such as Hg2+, Ag+.
D
Acid phosphatases hydrolyze biological phosphate esters at ~ pH 5.0.
3
2017 · Unclassified
LIFE SCIENCE PART B (DECEMBER 2017) 2017
What is the effect of a sudden increase in the levels of ATP and citrate on an erythrocyte undergoing glycolysis?
A
It inhibits glycolysis.
B
The rate of glycolysis remains unaltered.
C
The rate of glycolysis increases gradually.
D
It stimulates glycolysis.
4
2017 · Unclassified
LIFE SCIENCE PART B (DECEMBER 2017) 2017
The f and y values of a β-strand composed of all D-amino acids will mainly occupy which quadrant in the Ramachandran plot?
A
upper left
B
upper right
C
lower left
D
lower right
5
2017 · Unclassified
LIFE SCIENCE PART B (DECEMBER 2017) 2017
In a signalling event, binding of an extracellular ligand activates G-protein coupled receptor (GPCR) that eventually activates phospholipase C-(beta). Which one of the following statements truly reflects the function of phospholipase C-?
A
Phospholipase C- converts PI (3, 4, 5)P3 to PI (4, 5)P2
B
Phospholipase C- converts PI (4)P to PI (4, 5)P2
C
Phospholipase C- converts PI (4,5)P2 to diacylglycerol and IP3
D
Phospholipase C- converts PI (5)P to PI (4, 5)P2
6
2017 · Unclassified
LIFE SCIENCE PART B (DECEMBER 2017) 2017
Select a cellular body which is NOT a part of the nuclear bodies:
A
P-bodies
B
Cajal bodies
C
Interchromatin granule clusters
D
Nucleolus