Infectionus proteins are present in
geminiviruses
prions
viroids
viroids
B.
prions
Prions have a distinct extracellular from but the extracellular form is entirely protein. The prion particle does not contain any nucleic acid.However, it is infectious and prions are known to cause a variety of diseases in animals such scrapie in sheep, bovine spongiform encephalopathy in cattle (BSE or mad cow disease' ) chronic wasting disease in deer and elk and kuru and a form a Creutz Feldt- Jakob disease (CJD) in humans. No prion diseases of plants are known.
Which one of the following is one of the cahracteristics of a biological community?
Stratification
Natality
Mortality
Mortality
Which one of the following statemtents about morula in human is correct?
It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
It has far less cytoplasm as well as less DNA than in an uncleaved zygote
It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote
It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote
The two gases making highest relative contribution to the green house gases are
CO2 and CH4
CH4 and NO2
CFCs and N2O
CFCs and N2O
Which one of the following is not used in organic farming?
Glomus
Earthworm
Oscillatoria
Oscillatoria
Stirred -tank bioreactors have been designed for
the addition of preservatives of the product
purification of the product
ensuring anaerobic conditions in the culture vessel
ensuring anaerobic conditions in the culture vessel
An imporved variety of trasgenic basmati rice
does not require chemical fertilisers and growth hormones
gives high yield nd is rich in vitamin-A
is completely resistant to all insect pests and diseases of paddy
is completely resistant to all insect pests and diseases of paddy
Which one of the following symbols and its representation, used in human pedigree analysis is correct?
