Photochemical smog pollution does not contain
ozone
nitrogen dioxide
carbon dioxide
carbon dioxide
C.
carbon dioxide
Photochemical smog is highly oxidising polluted atmosphere comprising largely of ozone (O3), oxides of nitrogen (NOx), hydrogen peroxide (H2O2), organic peroxides, peroxy acetyl nitrate (PAN) and peroxy benzyl nitrate (PBzN).
Some sulphates and nitrates can also be formed in photochemical smog due to oxidation of sulphur containing components (SO2, H2S) and NOx (N2O5, NO2) but it does not contain carbon di-oxide (CO2). Photochemical smog materials and causes damage to plants, human health hazards and corrosion problems.
Which antibiotic inhibits interaction between t-RNA and m-RNA during bacterial protein synthesis?
Erythromycin
Neomycin
Streptomycin
Streptomycin
Phenotype of an organism is the result of
mutations and linkages
cytoplasmic effects and nutrition
environmental changes and sexual dimorphism
environmental changes and sexual dimorphism
In which mode of inheritance do you expect more maternal influence among the off spring?
Autosomal
Cytoplasmic
Y-linked
Y-linked
Long filamentous threads protruding at the end of a young cob of maize are
anthers
styles
ovaries
ovaries
Conifers differ from grasses in the
production of seeds from ovules
lack of xylem tracheids
absence of pollen tube
absence of pollen tube
How many different kinds of gametes will be produced by a plant having the genotype AABbCC?
Three
Four
Nine
Nine
In maize, hybrid vigour is exploited by
bombarding the protoplast with DNA
crossing of two inbreed parental lines
harvesting seeds from the most productive plants
harvesting seeds from the most productive plants
Amino acid sequence, in protein synthesis is decided by the sequence of
t-RNA
m-RNA
c-DNA
c-DNA
The bacterium (Clostridium botulinum) that causes botulism is
a facultative anaerobe
an obligate anaerobe
a facultative aerobe
a facultative aerobe
