You are working in the field with your favorite bacteria species, Bacterium BB. You carry out some experiments with Bacterium BB, and find that it can now degrade toluene and it is pathogenic! What happened?
A. Bacterium BB acquired degradative and virulence plasmids by horizontal gene transfer.
B. Bacterium BB picked up fertility and Col-plasmids via conjugation.
C. Bacterium BB was exposed to a bacteriophage which is now in its lytic phase.
D. Bacterium BB was transformed with a resistance plasmid and a digestive plasmid.
E. Bacterium BB sexually reproduced with another strain of bacteria that had both toluene-degrading gene and virulence gene.
A. Bacterium BB acquired degradative and virulence plasmids by horizontal gene transfer.
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Which of the following is not true of genomic and cDNA libraries?
A. Genomic libraries contain fragments of genomic DNA that are generated by partial digests with restriction enzymes. B. cDNA libraries contain cDNAs made from mRNA. C. cDNA libraries only contain sequences from transcribed genes. D. Genes represented in cDNA libraries contain control sequences that direct transcription. E. Genomic libraries usually contain large fragments and are likely to be constructed in YAC or BAC vectors.
Metamerism is:
A. the division of the body into segments B. the fusion of body parts C. shedding of the skin D. formation of the germ layers in early development E. the first cellular division following fertilization
Which of these is Not a Lipid?
a. cholesterol b. RNA c. steroids d. phospholipid e. wax
Which of the following is the purpose of using a control groups in an investigation?
a) to establish a standard for data comparison b) to provide the correct answer to an investigation c) to determine the dependent variables d) to function as a third variable group