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Write the names of the following:
A 15 mya primate that was ape-like
Concept: Human Evolution
Write the names of the following:
A 2 mya primate that lived in East African grasslands
Concept: Human Evolution
With the help of an algebraic equation, how did Hardy-Weinberg explain that in a given population the frequency of occurrence of alleles of a gene is supposed to remain the same through generations?
Concept: Hardy Weinberg’s Principle
How do cytokine barriers provide innate immunity in humans?
Concept: Immunity
Name the source plant of heroin drug. How is it obtained from the plant?
Concept: Types and Effects of Psychoactive Drugs >> Effects of Drug and Alcohol Abuse
Your advice is sought to improve the nitrogen content of the soil to be used for cultivation of a non-leguminous terrestrial crop.
- Recommend two microbes that can enrich the soil with nitrogen.
- Why do leguminous crops not require such enrichment of the soil?
Concept: Microbes as Biofertilizers
Give an example of a bacterium, a fungus and an insect that are used as biocontrol agents.
Concept: Microbes as Biocontrol Agents
How has the development of bioreactor helped in biotechnology?
Concept: Principles of Processes of Biotechnology
Name the most commonly used bioreactor and describe its working.
Concept: Principles of Processes of Biotechnology
Explain the roles of the following with the help of an example each in recombinant DNA technology :
Restriction Enzymes
Concept: Tools of Recombinant DNA Technology >> Restriction Enzymes
Explain the roles of the following with the help of an example each in recombinant DNA technology :
Plasmids
Concept: Tools of Recombinant DNA Technology >> Competent Host (For Transformation with Recombinant DNA)
“India has greater ecosystem diversity than Norway.” Do you agree with the statement? Give reasons in support of your answer.
Concept: Biodiversity
Write the difference between genetic biodiversity and species biodiversity that exists at all the levels of biological organisation.
Concept: Biodiversity
Define azeotropes.
Concept: Vapour Pressure of Liquid Solutions >> Vapour Pressure of Liquid- Liquid Solutions
What type of deviation is shown by a mixture of ethanol and acetone? Give reason.
Concept: Vapour Pressure of Liquid Solutions >> Vapour Pressure of Liquid- Liquid Solutions
State Kohlrausch’s law of independent migration of ions.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
The following data were obtained during the first order thermal decomposition of SO2Cl2 at a constant volume :
SO2Cl2 (g) → SO2 (g) + Cl2 (g)
| Experiment | Time/s–1 | Total pressure/atm |
| 1 | 0 | 0.4 |
| 2 | 100 | 0.7 |
Calculate the rate constant.
(Given : log 4 = 0.6021, log 2 = 0.3010)
Concept: Factors Influencing Rate of a Reaction
The conversion of molecules A to B follow second order kinetics. If concentration of A is increased to three times, how will it affect the rate of formation of B?
Concept: Factors Influencing Rate of a Reaction
Give reasons:
Transition metals show variable oxidation states.
Concept: Physical Properties of the Transition Elements (d-block)
Complete the following equation : MnO4- + 8H+ + 5e- →
Concept: Important Compounds of Transition Elements
