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A host cell must be made competent, before it is able to receive an rDNA. Justify.
Concept: Applications of Biotechnology in Health and Medicine
- Give an example of a genus of virus used as narrow spectrum insecticidal biocontrol agent.
- How does its use serve as an aid in overall integrated pest management programme?
Concept: Microbes as Biocontrol Agents
Why must a cell be made ‘competent’ in biotechnology experiments? How does calcium ion help in doing so?
Concept: Tools of Recombinant DNA Technology >> Competent Host (For Transformation with Recombinant DNA)
Explain with the help of a suitable example the naming of a restriction endonuclease.
Concept: Tools of Recombinant DNA Technology >> Restriction Enzymes
How are 'sticky ends' formed on a DNA strand? Why are they so called?
Concept: Tools of Recombinant DNA Technology >> Restriction Enzymes
Name two commonly used bioreactors.
Concept: Processes of Recombinant DNA Technology
State the role of “biolistic gun” in biotechnology experiments.
Concept: Tools of Recombinant DNA Technology >> Competent Host (For Transformation with Recombinant DNA)
Name and explain the technique used for separating DNA fragments and making them available for biotechnology experiments.
Concept: Principles of Processes of Biotechnology
Write the role of ‘restriction sites’ in the cloning vector pBR322.
Concept: Tools of Recombinant DNA Technology >> Cloning Vectors
Answer the following question:
Describe the formation of recombinant DNA by the action of EcoRI.
Concept: Processes of Recombinant DNA Technology
A Tight one-to-one relationship between many species of fig tree and certain wasps is an example of ______.
Concept: Population Interactions
"Cattle and goats do not browse the Calotropis plant." Justify the statement giving reasons.
Concept: Population Interactions
What is primary productivity?
Concept: Concept of Ecosystem >> Productivity
Define decomposition.
Concept: Concept of Ecosystem >> Decomposition
Why does primary productivity vary in different types of ecosystems?
Concept: Concept of Ecosystem >> Productivity
State the relation between gross and net primary productivity.
Concept: Concept of Ecosystem >> Productivity
What is the primary productivity of an ecosystem and how is it expressed?
Concept: Concept of Ecosystem >> Productivity
Explain what does the equation given below show:
NPP = GPP – R
Concept: Concept of Ecosystem >> Productivity
Write any two limitations of ecological pyramids.
Concept: Ecological Pyramids
The following graph shows the species-area relationship. Answer the following questions as directed.
(a) Name the naturalist who studied the kind of relationship shown in the graph. Write the observations made by him.
(b) Write the situations as discovered by the ecologists when the value of ‘Z’
(Slope of the line) lies between:
- 0.1 and 0.2
- 0.6 and 1.2
What does ‘Z’ stand for?
(c) When would the slope of the line ‘b’ become steeper?
Concept: Patterns of Biodiversity
