A researcher studying bacterial toxin predicts that a lysine within the toxin is important for binding it’s target cell.  She used site-directed mutagenesis to change a codon for lysine (AAA) to one for asparagine (AAU).  However, the mutant toxin still binds to its target cell just as well as the wild-type toxin bound and appears to have no other changes. This type of mutation is probably

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#Question id: 8926

#XL - R Botany

Sponges and cnidarians are among the fossilized animals found in both the Ediacara Hills and the Burgess Shale from the Rocky Mountains of British Colombia. This observation requires that

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#Question id: 11093

#XL - T Zoology

The rate of O2 uptake by the breathing organ depends on the

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#Question id: 16475

#XL - R Botany

Cultures that facilitate cell-to-cell interactions and signaling among cells and allow their study, are

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#Question id: 19861

#XL - P Chemistry

The limiting line in Balmer series will have a frequency of

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#Question id: 3757

#XL - Q Biochemistry

Which of the following characteristics of eukaryotic telomeres cause them to replicate differently than the rest of the chromosome?