Just as Xenopsylla is to Yersenia pestis, so is:
Glossina palpalis to Wuchereria bancrofti
Culex to Plasmodium falciparum
Homo sapiens to Taenia solium
Phlebotomus to Leishmania donovani
Continued consumption of a diet rich in butter, red meat and eggs for a long period may lead to:
vitamin toxicity
kidney stones
hypercholesterolemia
urine laden with ketone bodies
What is true about tRNA?
It binds with an amino acid at it 3' end
It has five double stranded regions
It has a codon at one end which recognizes the anticodon on messenger RNA
It looks like clover leafin the three dimensional structure
Which one of the following is a matching pair of certain organism(s) and the kind of association?
Shark and sucker fish - commensalism
Algae and fungi in lichens - mutualism
Orchids growing on trees - parasitism
Cuscuta (dodder) growing in other flowering plants - epiphytism.
Photochemical smog formed in congested metropolitan cities mainly consists of:
ozone, peroxyacetyl nitrate and NOx
smoke, peroxyacetyl nitrate and SO2
hydrocarbons, SO2 and CO2
hydrocarbons, ozone and SOx
A.
ozone, peroxyacetyl nitrate and NOx
Photochemical smog mainly consists of ozone, pcroxyacetyl nitrate and different oxide of
nitrogen and hydrocarbons released from different engines.
Nitric oxide or NO is formed by reaction between oxygen and nitrogen. This reacts with air forming nitrogen dioxide (NO2). This gas absorbs light due to which nitric oxide (NO) and a molecule of nascent oxygen [O] are formed.
NO2 NO + [O]
This atomic oxygen reacts with unburnt hydrocarbons to give rise to peroxy radicals which after reaction with oxygen form ozone or reacting with NO2 give rise to peroxyacetyl nitrate (PAN).
In almost all Indian metropolitan cities like Delhi, the major atmospheric pollutant(s) is/are:
suspended particulate matter (SPM)
oxides of sulphur
carbon dioxide and carbon monoxide
oxides of nitrogen
Restriction enzymes:
are endonucleases which cleave DNA at specific sites
make DNA complementary to an existing DNA or RNA
cut or join DNA fragments
are required in vectorless direct gene transfer.
The map given below indicates the Former and the present distribution of an animal. Which animal could it be:
Wild ass
Nilgai
Black buck
Lion