Name three features that a cloning vector for use in bacteria must contain. Explain your answers
What will be an ideal response?
A cloning vector for use in bacteria must contain the following:
1. a bacterial replication origin (to allow the plasmid to be replicated)
2. at least one unique restriction site (to allow easy insertion of foreign DNA)
3. an antibiotic-resistance gene or some other selectable marker gene (to allow selection for bacteria that have taken up the recombinant plasmids)
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Which of the following is INCORRECT concerning
Radiolarians? a. They have perforated shells of calcium carbonate. b. They form part of the plankton. c. They use pseudopods for feeding. d. They have vacuoles that impart buoyancy. e. They are heterotrophic protists.
When a carbohydrate is digested, what is the product?
A. energy B. simple sugars C. amino groups D. glycerol and fatty acids
TRAIT SPECIESABCDE101111200111310101401111500001610101 The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, and a "1" indicates the derived condition. Which species would you designate as the outgroup?
A. 4 B. 1 C. 3 D. 5 E. 2
Which of the following is true of Agrobacterium tumefaciens?
A. It can enter plants through unbroken leaf tissue B. It causes crown gall disease when it carries a tumor inducing (Ti) plasmid C. It is capable of nitrogen fixation D. All of the choices are correct.