Carriers of Entamoeba histolytica are-

a) Mosquito of genus anophelesb) Cattlec) Musca domesticad) Healthy human host

Wuchereria is found in

a) Lymph nodesb) Lungsc) Eyed) Gonads

Haemozoin is

a) A precursor of haemoglobinb) A toxin from streptococcusc) A toxin of plasmodium spsd) A toxin of haemophilis sps

What would happen if oxygen availability to activated sludge flocs is reduced?

a) It will slow down the rate of degradation of organic matterb) The centre of flocs will become anoxic, which will cause deathc) Flocs would increase in size as anaerobic bacteria would grow around flocsd) Protozoa would grow in large numbers

Which of the following helps in the absorption of phosphorous from the soil by plants

a) Glomusb) Rhizobiumc) Frankiad) Anabena

Monascus purpureus is a yeast used commercially in the production of

a) Ethanolb) Streptokinase for removing clots from the blood vesselsc) Citric acidd) Blood cholesterol lowering agents

Cry I endotoxins obtained from Bacillus thuringiensis are effective against

a) Cotton ballwormsb) Nematodes c) Mosquitoes d) Flies

Which one of the following steps are catalysed by Taq polymerase in a PCR reaction

a) Denaturation of DNA templateb) Annealing of primers to template DNAc) Extension of primer end on the template DNAd) All of the above

Which of the following Pallindromic base sequence in DNA can be easily cut at about the middle by some particular restriction enzyme

a) 5’CACGTA 3’; 3’ CTCAGT5’b) 5’CGTTCG 3’; 3’ATGGTA5’c) 5’ GATATC3’; 3’CTACTA5’d) 5’ GAATTC3’; CTTAAG5’

Which one is a true statement regarding DNA polymerase used in PCR

a) It is used to ligate introduced DNA in recipient cellb) It serves as a selectable markerc) It is isolated from a virusd) It remains active at a high temperature

Biolistics is suitable for

a) Disarming pathogen vectorsb) Transformation of plant cells c) Constructing recombinant DNA by joining with vectorsd) DNA fingerprinting

In RNA I, genes are silenced using

a) ssDNAb) dsDNAc) dsRNAd) ssRNA

An analysis of chromosomal DNA using the southern hybridization technique does not use

a) electrophoresis b) Blottingc) Autoradiographyd) PCR.