31.

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 NO_x

• smoke, peroxyacetyl nitrate and SO₂

• hydrocarbons, SO₂ and CO₂

• hydrocarbons, ozone and SO_x

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

Which one of the following correctly represents the manner of replication of DNA?

Which one of the following codons codes for the same information as UGC?

• UGU

• UGA

• UAG

• UGG