A fermentation broth with viscosity 10 −2 Pa s and density 1000 kg m − 3 is agitated in a 2.7 m^ 3 baffled tank using a Rushton turbine with diameter 0.5 m and stirred speed 1 s ^−1. Estimate the mixing time.

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#Question id: 2122

#SCPH28 | Zoology

The inner (plasma) membrane of E. coli is about 75% lipid and 25% protein by weight.  How many molecules of membrane lipid are there for each molecule of protein?  (Assume that the average protein is Mr 50,000 and the average lipid is 750.)

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#Question id: 2123

#SCPH06 I Botany

Which of these statements about the composition of membranes is true?

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#Question id: 2123

#SCPH28 | Zoology

Which of these statements about the composition of membranes is true?

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#Question id: 2124

#SCPH06 I Botany

An integral membrane protein can be extracted with:

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#Question id: 2124

#SCPH28 | Zoology

An integral membrane protein can be extracted with:

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#Question id: 2125

#SCPH06 I Botany

The shortest alpha helix segment in a protein that will span a membrane bilayer has about _____ amino acid residues.