Which process allowed the nucleomorphs of chlorarachniophytes to be first reduced, and then (in a few species) lost altogether, without the loss of any genetic information?

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#Question id: 1672

#XL - Q Biochemistry

Using only random VDJ recombination, from 40 V, 23 D, and 6 J gene segments, what are the number of possible variable regions of an antigen receptor molecule?

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#Question id: 11940

#XL - T Zoology

Which of the following is filtered most readily by the glomerular capillaries?

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#Question id: 2189

#XL - S Microbiology

Which of the following is not true of membrane phosphoglycerides?

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#Question id: 1091

#XL - Q Biochemistry

Why does testosterone, a lipid-soluble signaling molecule that crosses the membranes of all cells, affect only target cells?

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#Question id: 19496

#XL - P Chemistry

The radius of an atomic nucleus is of the order of————–