Gene Regulation and Protein Synthesis

May 20th, 2015
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1. The lac regulatory protein is called a repressor. -because it keeps away RNA polymerase from transcribing the structural genes. 2. When lactose is present, the lac genes are expressed.

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biologyCrossbreedingrefers to the process of breeding such an animal, often with the intention to create offspring that share the traits of both parent lineages, or producing an animal withhybrid vigor. While crossbreeding is used to maintain health and viability of animals, irresponsible crossbreeding can also produce animals of inferior[clarification needed]quality or dilute apurebredgene pool to the point ofextinctionof a givenbreedof animal.Intercroppingis the practice of growing two or morecropsin proximity. The most common goal of intercropping is to produce a greater yield on a given piece of land by making use of resources that would otherwise not be utilized by a single crop. Careful planning is required, taking into account thesoil,climate, crops, andvarieties. It is particularly important not to have crops competing with each other for physical space,nutrients,water, orntercropping of compatible plants also encouragesbiodiversity, by providing a habitat for a variety ofinsectsandsoil organismsthat would not be present in a single-crop environment.sunlight..intercropping also uses the practice of sowing a fast growing crop with a slow growing crop, so that the fast growing crop is harvested before the slow growing crop starts to mature. This obviously involves some temporal separation of the two crops. Animal husbandryis theagriculturalpractice ofbreedingand raisinglivestock. Techniques such asartificia

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