Describe the function of restriction enzymes. Give an example. |
OR |
Write any two uses of gene cloning. |
(i) Why asexual reproduction does not produce the genetic variability? |
(ii) Banana is a parthenocarpic fruit whereas oranges show polyembryony. How are they different from each other with respect to seeds? |
Draw a schematic representation of dinucleotide. Label the following. |
(i) The components of a nucleotide phosphodiester linkage. |
(ii) 5' end |
(iii) N-glycosides linkage |
(iv) Phosphodiester linkage. |
Name the cells that produce antibodies. Explain their structure and functions. |
OR |
(i) What is meant by withdrawal symptoms? |
(ii) Write the useful prevention and control methods of alcohol and drug abuse among adolescents. |
(i) Do you agree that Ramesh has contributed little in saving our planet? Justify giving two reasons. |
(ii) What would happen if biodiversity is lost? |
(iii) What values are shown by Ramesh? |
(i) With the help of a labelled diagram depict the organization of a typical embryo sac just after double fertilization. |
(ii) How are seeds advantageous to angiosperms? |
OR |
What are out-breeding devices? Explain the different types. |
Represent diagrammatically Hershey-Chase experiment. What did this Experiment prove? |
OR |
Write the salient features of double helix structure of DNA. |
Describe the following drugs and what kind of drugs these are g |
(i) Opioids |
(ii) Cannabinoids |
(iii) Cocaalkaloid |
(iv) Hallucinogens |
(v) Alcohol |
OR |
Explain the use of microbes in household products. |
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