TNPSC Scientific Assistant Biochemistry Paper 2010

Tamil Nadu Public Service Commission Scientific Assistant Biochemistry Paper 2010

Tumefaciens induce which disease in plant?
(a) Crown gall
(b) Hairy root
(c) Necrosis
(d) Chorosis

Which immunoglobulin is found in secretion such as milk?
(a) IgG
(b) IgM
(c) IgA
(d) IgD

PBAD vector uses
(a) arabinose operon
(b) gal operon
(c) lactose operon
(d) Trp operon

An experiment began with 4 cells and ended with 128 cells. How many generations did the cells go through?
(a) 64
(b) 06
(c) 05
(d) 04

As membrane fluidity increase, the following occurs except
(a) permeability to water increases
(b) lateral mobility of integral proteins increases
(c) the rate of transport by transport proteins
(d) permeability of large hydrophilic molecules increases

The highest mass peak in the mass spectrum of PF3 comes at m/z=88 and is a single peak. Which statement is consistent with these data?
(a) Fragmentation of PF3 occurs in the mass spectrometer
(b) P-F bond cleavage is facile in the mass spectrometer
(c) F and P are monotopic
(d) Either P or F, but not both, is monotopic

A double-standard RNA genome isolated from a virus in the stool of a child with gastroenteritis was found to contain 15% Uracil. What is the percentage of Guanine in this genome?
(a) 15
(b) 25
(c) 35
(d) 75

Oxidation and phosphorylation in intact mitochondria is completely blocked by
(a) Piericidin A
(b) Antimycin A
(c) Oligomycin
(d) Amobarbital

What is the role of zinc ion in liver alcohol dehydrogenase catalysis?
(a) General acid catalysts
(b) General base catalyst
(c) Nucleophilic catalyst
(d) Electrophilic catalyst

Under normal conditions, which of the following blood energy sources is the preferred fuel of muscle?
(a) Glucose
(b) Ketone bodies
(c) Amino acids
(d) Free fatty acids