Which of the following statements regarding vectors is FALSE?
A) Vectors are usually autonomously replicating DNA molecules.
B) A useful vector contains multiple restriction sites for insertion of DNA.
C) Vectors are generally over 100,000 base pairs in size.
D) Cloning vectors frequently contain sequences necessary for expression of inserted sequences.
E) Cloning vectors include a "marker" to facilitate identification of cells containing them.
C
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Researchers often work with temperature-sensitive mutations ________, because null alleles of these genes create mutants that cannot grow under any conditions.
A) that confer antibiotic resistance B) in essential genes C) that affect colony morphology D) that affect metabolism
A hormone-receptor complex that stimulates the
formation of a second messenger is indicated by a. B. b. C. c. E. d. F. e. G.
Ehlers–Danlos syndrome and scurvy both are characterized by defects in
A) fibronectin. B) desmosomes. C) collagen. D) dystrophin. E) elastin.
Individuals who have partial or complete development of both male and female sex organs are
A. homosexual. B. intersexual. C. transgender. D. All of the above are correct.