Organisms share many conserved core processes and features, including transcription and translation using a uniform genetic code. Scientists have used these shared processes and features in biotechnology
For example, for the process of some transformations, a plasmid is constructed when a eukaryotic gene of interest is added with an antibiotic resistant gene such beta-lactamase, which is used for ampicillin resistance. This plasmid is then inserted into a prokaryotic bacterial cell, such as E-coli, through a transformation process that leads to the production of the product protein from the eukaryotic organism. To culture the bacteria and obtain the protein product, the bacteria must grow. Select the appropriate condition to determine if the plasmid has entered the E-coli bacterial cell. A) Nutrient broth to which no antibiotic has been added.
B) Water to which ampicillin has been added.
C) Nutrient broth to which ampicillin has been added.
D) Nutrient broth to which other resistant bacteria have been added.
C
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The results shown in the graphs support the hypothesis that _____
A) adding the defensin gene to such mutants protects them from death by fungal infection B) adding the drosomycin gene to such mutants protects them from death by fungal infection C) wild-type flies with the full set of genes for antimicrobial peptides are highly susceptible to these infective agents D) the presence of any single antimicrobial peptide protects against both infective agents E) even the wild-type flies rarely, if ever, survive for five days
Naturalists originally divided the earth into
__________ biogeographic realms. a. 3 b. 4 c. 5 d. 6 e. 8
When did the level of oxygen in Earth's atmosphere become high enough to sustain aerobic respiration?
A) 1.0 billion years ago B) 1.5 billion years ago C) 2.7 billion years ago D) 3.5 billion years ago
Sex linkage involves traits on chromosome number _____________.
a. 1 b. 7 c. 10 d. 23