Which of the following blotting techniques allows a researcher to determine the number of copies of a gene within the genome of an organism?
A. Western blotting
B. colony hybridization
C. Northern blotting
D. Southern blotting
E. Eastern blotting
D. Southern blotting
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Four of the following statements about crocodilians are true. Which statement is false?
a. They live in or near water. b. They are predators with sharp teeth. c. They have a two-chambered heart. d. They have powerful jaws. e. They are the closest living relatives to birds.
What do gametes, spores, and the gametophyte
generation have in common? a. They are all diploid. b. They are all haploid. c. They are present in vascular plants only. d. They are all produced by meiosis. e. They have none of these in common.
It has been observed that viral particles often revert (back mutate to non-AZT-resistant populations when treatment with AZT is discontinued. What is the most likely reason for this observation?
What will be an ideal response?
Which of the following statements regarding the cell-mediated immune response is TRUE?
A) Cytotoxic T lymphocytes do not require antigen presentation to become activated. B) Cytotoxic T lymphocytes interact with antibodies that have bound antigen to identify their target. C) Helper T lymphocytes have no role in the activation of cytotoxic T lymphocytes. D) Cytotoxic T lymphocytes kill by producing hydrogen peroxide. E) A single cytotoxic T lymphocyte can kill many target cells.