Of what advantage is it to have a multiple cloning site (multiple unique restriction sites) embedded in the lacZ component of a plasmid?
What will be an ideal response?
An insert of DNA in the multiple cloning site inactivates the lacZ component and allows identification of recombinant plasmids under proper genetic and environmental conditions.
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Algal blooms deplete the water of
a. oxygen. b. carbon dioxide. c. nitrogen. d. phosphorus. e. calcium
Match each toxin type below with its effect on the human host.
a. exotoxins b. endotoxins 1. have systemic effects such as fever, inflammation, diarrhea, and shock 2. have effects on a specific cell type
A student poses the question: How does the presence of dissolved salt affect the freezing point of water? To answer this question, the student set up two conditions. In the first condition, the student added salt to water in a container and referred to this condition as the variable. In the second condition, the student did not add any salt to water in a second container and referred to this condition as the control. The student took both containers and attempted to freeze the water at various temperatures to assess the freezing point. Would this be a valid experiment?
A. Yes, because there is more than one variable. B. No, because there is only one variable and a control C. Yes, because there is one variable and a control D. No, because there is not more than one variable
Living things ordinarily too small to be seen with the unaided eye are termed ________.
Fill in the blank(s) with the appropriate word(s).