A rapidly growing bacterial species such as E. coli exhibits a typical phase of growth cycle in liquid nutrient broth. If a bacterial culture has starting density 1000 cells/ml in log phase and after four hours cell density is 4000 cells/ml.  What is specific growth rate per hour? 

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#Question id: 361

#XL - S Microbiology

Calculate the percentage of histidine that has its imidazole side chain protonated at pH 7.3. The pKa values for histidine are pK1 = 1.8, pK2 (imidazole) = 6.0, and pK3 = 9.2.

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#Question id: 20243

#XL - P Chemistry

The bond order of O ^-₂  is

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#Question id: 352

#XL - S Microbiology

One mole (mol) of glucose (molecular mass = 180 daltons) is ________.

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#Question id: 1762

#XL - Q Biochemistry

What do Th1 cells secrete?

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#Question id: 1573

#XL - S Microbiology

Which cells and which signaling molecules are responsible for initiating an inflammatory response?