What technical advance made it possible to crystallize DNA?
What will be an ideal response?
Chemical synthesis of DNA oligonucleotides in the late 1970s made it possible. Until then, investigators were unable to produce enough sequence-specific DNA molecules to grow crystals.
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One of the first uses of DNA renaturation (hybridization) was to determine the degree of similarity in DNA between different pairs of species; this, in turn, is a measure of how closely the species are related evolutionarily
In renaturation studies, the genetic similarity between two samples is measured by determining: A. the number and locations of bands on an electrophoresis gel. B. the number of restriction sites in each of the samples. C. the temperature at which the two samples renature. D. the rate at which PCR amplifies the two samples. E. the nucleotide sequences of each sample.
Which one of the following is not found in a bacterial nucleoid?
A. proteins B. supercoiled DNA C. enzymes D. histones E. All of the answer options are found in a bacterial nucleoid.
The number of occurrences of which event correlates closely with the number of recombination nodules along each homologous chromosome arm?
What will be an ideal response?
Historically, in the field of taxonomy, what characteristic was most commonly used for determining species relationships?
A) Chromosomal similarity B) Anatomical similarity C) DNA sequence similarity D) Geographic proximity E) Capability of interbreeding