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Explain how E. coli uses chemotaxis to move away from repellents. how does repellent affect the change in rotation of the flagella? How does the level of methylation result in changes in rotation of the flagella? How does repellent binding affect the MCP function, CheB, CheW, CheY?
A bacteria has the following lac operon genes located on the chromosome: I+P-Z-Y-A+. On a plasmid, this same bacterial cell has the lac genes I-P+Z-Y+A-. a) Which Lac proteins will be made? b) What type of protein expression (induced or constituit..
In fruit flies long wing (L) is dominant vestigial wing (l) is recessive gray body (G) is dominant ebony body is recessive. two fruit flies were mated that were long-winged gray bodies. The genotype of these two parental flies is LlGg x LlGg.
Describe and diagram the synthesis of a secretory protein on membrane-bound, Er-localized ribosomes.
A typical bacterial flagellum is about 20 nm wide. About how many times must the diameter of the flagellum be increased to make visible using a bright field microscope?
Examine the challenges faced by the Public Health System. Epidemiology and Evolving Health Care System
Which diseases could have been prevented by chlorinating the water, Cryptosporidium spp., Legionella, Escherichia coli, Gardia lamblia or Norovirus?
Explain the structure of a flagellum and how it operates and what are the four main types of flagellar arrangement?
In a populationof mice, there are two alleles of the A locus (A1 and A2). Tests show that in this population there are 384 mice of genotype A1/A1,210 of A1/A2, and 260 of A2/A2. What are the frequencies of the two alleles in the population?
How does sweating help you regulate your body temperature? Why do you feel hotter and more uncomfortable on a hot, humid day than on a hot, dry day?
While two monohybrid round squashes are crossed, the offspring ratio is ¼ flat, ½ oblong, ¼ round. Squash shape is therefore controlled by incomplete dominance. What offspring ratio would you expect from a cross between a plant with oblong fruit and ..
Suppose that you conducted a tissue fractionation and that you collected aliquots at each step. Suppose that in step one you suspended tissue in 100 ml buffer then homogenized the tissue.
many factors may affect the growth of this extraterrestial bacteria. Name these factors. Choose two nutritional factors and describe how you would test their effects.
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