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: 4998

#XL - S Microbiology

Many species of snakes lay eggs, but in the forests of northern Minnesota where growing seasons are short, only live-bearing snake species are present. This trend toward species that perform live birth is an example of

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#Question id: 5000

#XL - S Microbiology

The existence of evolutionary trends, such as increasing body sizes among horse species, is evidence that

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#Question id: 5075

#XL - T Zoology

Which of the following developmental processes has been most recently completed in the amphibian embryo shown here?

 

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#Question id: 5076

#XL - T Zoology

Homeotic genes are responsible for:

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#Question id: 5077

#XL - T Zoology

Humans and mice heterozygous for loss-of-function mutations in Pax6 have:

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#Question id: 5078

#XL - T Zoology

A human blastomere is: