Assume that a researcher conducted a cloning experiment using a typical plasmid, transformed an appropriate host bacterial strain, and plated the bacteria on an appropriate X-gal medium. Blue and white colonies appeared
Which of the two types of colonies, blue or white, would more likely contain the recombinant plasmid? Why?
the white colonies because of insertional activation of the lacZ component
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Which of the following statements about emerging viruses is false?
A. Emerging viruses are able to "jump" from one species to another. B. Hantavirus, which causes a hemorrhagic-type fever, originates in deer mice. C. Ebola is an emerging virus of unknown origins that can have a mortality rate in excess of 50%. D. The emerging virus SARS is a coronavirus. E. The stable genome of the SARS virus makes it an unlikely candidate for vaccine development.
Some clones of the original immune cells are __________ cells, long-lived B and T cells reserved for future
encounters with the antigen.
Fill in the blank(s) with the appropriate word(s).Parasites that live on the skin of their host are called ________
Fill in the blank(s) with correct word
The genes a, b, and c are different genes that reside on the same chromosome. Genes a and b are 10 cM apart, b and c are 2 cM apart, and a and c are 8 cM apart. What is the order of these genes?
A: A: a, c, b B: The order cannot be determined from the information given. C: a, b, c D: b, a, c E: c, a, b