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: 18014

#13. Methods in Biology

Each of five questions on a multiple-choice examination has four choices, only one of which is correct. The student is attempting to guess the answers. The random variable X is the number of questions answer correctly. Probability that the student will get Atmost three correct answers

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#Question id: 3697

#3. Fundamental Processes

In the Meselson-Stahl DNA replication experiment, what percent of the DNA was composed of one light strand and one heavy strand after one generation of growth in 14N containing growth media?

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#Question id: 19482

#12. Applied Biology

It has been proposed that the DNA-protein complex forms 

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#Question id: 932

#1. Molecules and their Interaction Relevant to Biology

Ammonia is incorporated into amino acids via which of the following?

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#Question id: 16315

#7. System Physiology – Animal

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