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In constructing an oligonucleotide probe based on information from a protein's sequence, one often chooses (if possible) regions of a sequence containing tryptophan or methionine residues.Why?
a. The synthesis of most proteins starts with methionineor a derivative there of, so a methionine codon assures one willstart at the beginning of the gene.
b. These two amino acids are both encoded by multiplecodons such that the degeneracy of the genetic code makes itpossible for a number of sequences to recognize and bind to thetarget sequence.
c. As these two amino acids have only one codon, the oligonucleotide probe will have a greater specificity for the DNA fragment being sought.
Suppose the environment in which a population was living changed in some way and the new conditions were much more harmful to homozygous dominant individuals and to heterozygotes than to homozygous recessive?
To determine the evolutionary relationship of 2 different animals, you can compare their DNA for similarities. Before there was DNA testing, how did we determine how closely 2 defferent organisms were related to each other?
What are the possible genotypes of the parents? If thedisease is a chromosomal abnormality describe theabnormality.
Compute the minimum length nucleotide sequence you need before you can expect a match to either strand to be unique, under the naïve assumption.
Three bases per codon are the minimum necessary to code for twenty different amino acids when four different bases are involved.
Mary is less fearful of death than many older people her age. According to the text, a major reason for Mary's diminished fear of death probably is her
Which of the following statements about animal connective tissues is true?
Irradiate the DNA with UV light and show the effects. Explain the effect the irradiation will have on transcription and how the damage could be repaired.
Explain why do genomes of eukaryotes need to have multiple origins of replication, whereas bacterial genomes have only a single origin?
Which of the following is not one of the ways to describe a population in terms of population ecology?
Specify the patient’s role in alteration of the behavior? What research has been done in order to substantiate effect of the patient’s involvement? What is measured?
Why is a spectrometer calibrated with saltwater before taking the measurement of an E. coli cell concentration? Do you always calibrate a spectrometer with saltwater?
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