A culture has a cell concentration of 1 × 10⁹ cells/mL and a biomass yield coefficient (Y_x/s) of 0.5 g biomass/g substrate. If 2 grams of substrate are consumed, calculate the biomass produced (in grams).

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#Question id: 164

#XL - T Zoology

The uncommon amino acid selenocysteine has an R group with the structure —CH2—SeH (pKa = 5).  In an aqueous solution, pH = 7.0, selenocysteine would:

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#Question id: 165

#XL - T Zoology

Amino acids are ampholytes because they can function as either a(n):

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#Question id: 166

#XL - T Zoology

For amino acids with neutral R groups, at any pH below the pI of the amino acid, the population of amino acids in solution will have:

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#Question id: 167

#XL - T Zoology

The formation of a peptide bond between two amino acids is an example of a(n) ______________ reaction.

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#Question id: 168

#XL - T Zoology

 The peptide alanylglutamylglycylalanylleucine has:

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#Question id: 169

#XL - T Zoology

 An octapeptide composed of four repeating glycylalanyl units has: