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    Chromosomal puff of Polytene chromosome

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    1. Explain why a well-adapted organism synthesizes only the proteins necessary at any particular moment.
    2. When radioactive uracil is injected into the developing larvae of Drosophilia, only certain regions of the chromosomes in certain tissues contain radioactive uracil. Explain this observation.

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    Solution Preview

    1. Protein synthesis at any particular moment depends upon the specific cellular conditions. It is a function of gene regulation or operon. Proteins in any cell are synthesized only at the time of its requirement. In ...

    Solution Summary

    Chromosomal puff is an important feature of salavary gland chromosome of drosophilia. Radioactive uridine is often utilized to study chromosomal puffs.

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