B lymphocytes and T lymphocytes mature in the thymus gland.
Answer the following statement true (T) or false (F)
False
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All of the following statements about ferns are correct except
A. ferns flourish in many habitats, but the majority are located in the tropics. B. the sporophyte is a conspicuous generation. C. the gametophyte is a conspicuous generation. D. ferns have underground stems called rhizomes. E. sori are located on the back or ventral surface of fronds.
What Takes Place During Prophase I?
What will be an ideal response?
A 6.85 kb EcoRI fragment of DNA is shown below. The location of several restriction sites is indicated. Scale is approximate.
If you were to digest this DNA with PstI, which length of DNA fragment would migrate the fastest on an agarose gel?
A. 2622 B. 235 C. 3425 D. 803
Why have scientists inserted the human insulin gene into the genome of E. coli bacteria?
A) A person who is unable to produce insulin can be cured if infected by a bacterium carrying the human insulin gene. B) Bacteria express the human insulin gene and produce large quantities of the insulin protein, which is sold pharmaceutically. C) Insertion of the human insulin gene into E. coli causes the cells to rupture, thereby controlling and reducing bacterial infections. D) The recombinant bacteria can be used in gene therapy of individuals who have type 1 diabetes. E) The engineered bacteria are used by the food industry as a supplement that improves the absorption of glucose