With reference to factors affecting the rate of photosynthesis, which of the following state- ments is not correct? Option 1 : Increasing atmospheric CO2 concentration up to 0.05 per cent can enhance CO2 fixation rate.Option 2 : C3 plants respond to higher temperatures with enhanced ...

Plants which produce characteristic pneumatophores and show vivipary belong to Option 1 : MesophytesOption 2 : PsammophytesOption 3 : HalophytesOption 4 : Hydrophytes

A disease caused by an autosomal primary non-disjunction is Option 1 : Klinefelter’s syndromeOption 2 : Down’s syndromeOption 3 : Turner’s syndromeOption 4 : Sickle cell Anaemia

A gene whose expression helps to identify transformed cell is known as Option 1 : VectorOption 2 : PlasmidOption 3 : Selectable markerOption 4 : Structural gene

Which of the following statements is correct, with reference to enzymes? Option 1 : Apoenzyme = Holoenzyme + CoenzymeOption 2 : Coenzyme = Apoenzyme + HoloenzymeOption 3 : Holoenzyme = Apoenzyme + CoenzymeOption 4 : Holoenzyme = Apoenzyme + Co-factor

What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis? Option 1 : Positively charged fragments move to farther end.Option 2 : Negatively charged fragments do not move.Option 3 : The smaller the fragment size, the farther it moves.Option 4 : The larger the ...

Functional megaspore in an angiosperm develops into Option 1 : Embryo sacOption 2 : EmbryoOption 3 : EndospermOption 4 : Ovule

In Bougainvillea thorns are the modification of Option 1 : Adventitious rootOption 2 : StemOption 3 : LeafOption 4 : Stipules

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen? Option 1 : PseudomonasOption 2 : MycoplasmaOption 3 : NostocOption 4 : Bacillus

Which one of the following statements is not valid for aerosols? Option 1 : They are harmful to human health.Option 2 : They have negative impact on agricultural landOption 3 : They alter rainfall and monsoon patterns.Option 4 : They cause increased agricultural productivity.