Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.
Streptococcus pneumoniae / Widal test
Salmonella typhi / Anthrone test
Salmonella typhi / Widal test
Plasmodium vivax / UTI test
C.
Salmonella typhi / Widal test
Among the given pairs, Salmonella typhi is the causative agent and its confirmatory test is Widal test. It is based on antigen antibody reaction.
Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for
used as a fertilizer
Construction of roads
Making tubes and pipes
Making plastic sacks
Which of the following pairs of gases is mainly responsible for green house effect?
Oxygen and nitrogen
Nitrogen and Sulphur dioxide
Carbon dioxide and Methane
Ozone and Ammonia
Match the following genes of the Lac operon with their respective products :
| A. i gene | (i) β-galactosidase |
| B. z gene | (ii) Permease |
| C. a gene | (iii) Repressor |
| D. y gene | (iv) Transacetylase |
Select the correct option
A - (iii); B - (i); C - (ii); D - (iv)
A - (iii); B - (i); C - (iv); D - (ii)
A - (iii); B - (i); C - (i); D - (ii)
A - (i); B - (iii); C - (ii); D - (iv)
DNA precipitation out of a mixture of biomolecules can be achieved by treatment with
Chilled ethanol
Methanol at room temperature
Chilled chloroform
Isopropanol
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by :
Gregor J. Mendel
Alfred Sturtevant
Sutton Boveri
T.H. Morgan
The Earth Summit held in Rio de Janeiro in 1992 was called
for conservation of biodiversity and sustainable utilization of its benefits
to assess threat posed to native species by invasive weed species
for immediate steps to discontinue use of CFCs that were damaging the ozone layer
to reduce CO2 emissions and global warming
Variations caused by mutation, as proposed by Hugo de Vries are
random and directionless
small and directional
small and directionless
random and directional
Which of the following can be used as a biocontrol agent in the treatment of plant disease?
Chlorella
Anabaena
Lactobacillus
Trichoderma
Which of the following immune responses is responsible for rejection of kidney graft?
Humoral immune response
Inflammatory immune response
Cell-mediated immune response
Auto-immune response
