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The lac operon is an brilliant example of negative control or negative regulation of gene expression in which they bound repressor stops transcription of the structural genes. The Positive control or positive regulation of gene expression is when the regulatory protein binds to enhances and DNA the rate of transcription. In that case the regulatory protein is called as an activator. The CAP or CRP included in regulating the lac operon is a good instance of an activator. Thus the lac operon is subject to both positive and negative control.
Explain Theory or Principle of Gram Staining of Bacterial Cultures? Foods are rich in various nutrients and can support the growth and survival of microorganisms. The microbial
Microorganisms and Plants can synthesize all of the 20 standard amino acids. Mammals, furthermore, cannot synthesize all 20 and must obtain some of them in their diet. Those amin
Define Role in protein metabolism and growth? Severe vitamin A deficiency results in abnormal RNA metabolism and protein synthesis and hence interferes with growth. Hence vitam
Define Advantages and Disadvantages of Swab Method? Advantages of Swab Method 1. Suitable for flexible, uneven and heavily contaminated surfaces. 2. Rapid, simple and ine
Explain the Heat Fixation Method? This is the usual method. Here, bacteria is fixed by gentle heating of air-dried bacterial film, which results in coagulation of bacterial pro
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Dendrology : This is the study of all kinds of trees. Dendrology we can also say it xylology it is the science or study of wooded plants like trees, shrubs, and lianas. There is no
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Define the metabolism and respiration of cornea. Metabolism and Respiration of Cornea The cornea requires energy for the maintenance of its transparency. Energy in
Explain the Bright Field Microscopes? Figure illustrates the compound bright field microscope. This is the most commonly used microscope in biology and microbiology courses. It
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