What information have the results of mitochondrial DNA analysis offered concerning the phylogenetic relationships between Neanderthals and modern humans?
What will be an ideal response?
Although Neanderthals and humans share a common ancestor, Neanderthals were a separate hominid line and probably did not contribute mitochondrial genes to H. sapiens.
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An episome is
A. a plasmid that can make bacterial cells resistant to antibiotics. B. a plasmid that gives bacteria the ability to degrade toluene. C. a plasmid that can integrate into the bacterial genome. D. a plasmid that can turn a bacteria that is harmless into a strain that can cause disease. E. a plasmid that gives bacteria the ability to exchange DNA with another bacterial cell.
Which directed evolution technology takes advantage of an error-prone DNA polymerase during the process of copying the genome over and over?
A. DNA shuffling B. Metabolic pathway engineering C. Whole genome shuffling D. Error-prone PCR
It has been observed that when plants are subjected to extreme physical stress such as drought or high salinity, the transcription and activity of transposase genes increases. Increased transposase activity may
A) increase the rate of mutation under stressful conditions. B) aid in repairing DNA damage caused by stressful conditions. C) halt DNA replication and cell division. D) increase homologous recombination and genetic diversity. E) explain why some plants can't withstand drought conditions.
A long poly-A-tail is necessary to initiate translation. Which protein binds directly to eIF4E to inhibit translation initiation?
A) PARN B) poly-A polymerase C) PABP D) CPEB E) maskin