Question

The molecular action of ultraviolet light is mainly reflected through

A. Destruction of hydrogen bonds in DNA  
B. Phtodynamic action
C. Formation of pyramidine
D. Formation of sticky metaphase
Answer :   Destruction of hydrogen bonds in DNA

Releted MCQ Question on
Botany >> Environmental Issues

Releted Question 1

Which of the following is a secondary pollutant?

A. $$CO$$
B. $$CO_2$$
C. $$O_2$$
D. $$SO_2$$
View Answer
Releted Question 2

Which one of the following statements is not valid for aerosols?

A. They alter rainfall and monsoon patterns
B. They cause increased agricultural productivity
C. They have negative impact on agricultural land
D. They are harmful to human health
View Answer
Releted Question 3

Acid rain is caused by increase in the atmospheric concentration of:

A. $$SO_3$$ and $$CO$$
B. $$CO_2$$ and $$CO$$
C. $$O_3$$ and dust
D. $$SO_2$$ and $$NO_2$$
View Answer
Releted Question 4

A location with luxuriant growth of lichens on the trees indicates that the:

A. Trees are very healthy
B. Trees are heavily infested
C. Location is highly polluted
D. Location is not polluted
View Answer

Practice More Releted MCQ Question on
Environmental Issues

Practice More MCQ Question on Biology Section

BotanyThe Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisonTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and DevelopmentReproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental IssuesBotany Miscellaneous
ZoologyAnimal KingdomStructural Organisation in AnimalsBiomoleculesDigestion and AbsorptionBreathing and Exchange of GasesBody Fluids and CirculationExcretory Products and Their EliminationLocomotion and MovementNeural Control and CoordinationChemical Coordination and IntegrationHuman ReproductionReproductive HealthEvolutionHuman Health and DiseasesBiotechnology: Principles and ProcessesBiotechnology and its ApplicationsZoology Miscellaneous