The various techniques by which scientists manipulate DNA in the lab are called
A. gene probes.
B. genetic engineering.
C. biotechnology.
D. recombinant DNA.
E. gel electrophoresis.
Answer: B
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Genomic DNA sequences seem to support the idea that the first eukaryotic cell arose from within the ________ lineage.
A. bacterial B. last universal common ancestor (LUCA) C. viral D. archaeal
Differentiate between the following terms: primates, anthropoids, hominoids, and hominids. What will be an ideal response?
Which of the following must bring in a virion-associated RNA-dependent RNA polymerase when it infects host cells?
A. +dsRNA viruses B. ?ssRNA viruses C. +ssRNA viruses D. All of the choices are correct.
Oxygen atoms gain two electrons when they react. Write the symbol of the ion that results. Is it a cation or anion?
What will be an ideal response?