In combination with homologous recombination, the CRISPR/Cas system can be used to accomplish
A) gene fusions.
B) gene deletion.
C) point mutations.
D) DNA cloning.
E) gene fusions, gene deletions, or point mutations.
Answer: E
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What is unusual about the 5' cap found on almost all eukaryotic mRNAs?
A. The nucelotide added is a guanine methylated at N7 and the bond is created between the phosphate group on the guanine and the phosphate on the terminal nucleotide B. The nucelotide added is a guanine methylated at N7 and the bond is a typical phosphodiester bond with the terminal nucleotide C. The nucelotide added is anadenine methylated at N7 and the bond is created between the phosphate group on the guanine and the phosphate on the terminal nucleotide D. The nucelotide added is an adenine methylated at N7 and the bond is typical phosphodiester bond with the terminal nucleotide
In general, microbial growth in the open ocean is most limited by the availability of ________.
A. iron B. manganese C. phosphorus D. nitrogen
The fungal-plant root combination is referred to as
a. mycorrhizae. b. symbiosis. c. hyphae. d. mycelia. e. lichen.
Amphibians are not completely free to live on dry land because
A. their reproduction depends on water. B. they can escape from predators by jumping into the water. C. their food organisms live in water. D. their ancestors were fish. E. they obtain oxygen from water through gills.