Which of the following is not a function of the plasma membrane?
A. contains the genetic information
B. determines which substances enter and leave the cell
C. serves as a boundary between the cell and its environment
D. marks the cell as belonging to a particular individual
E. contains receptor sites which determine how the cell interacts with its environment
Answer: A
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Known to cause an inflammatory bowel disease referred to as Johne's disease in cattle, sheep, and goats, which organism has been isolated from the bowel mucosa of patients with Crohn dis-ease?
a. M. paratuberculosis b. M. avium-intracellulare c. Mycobacterium phlei d. Mycobacterium lepraemurium
The zona pellucida is
A) a protective layer around the secondary oocyte. B) a protective layer around the sperm. C) a bump on the head of a sperm that contains enzymes. D) the biggest constriction of a chromosome.
Which term describes chromosomes whose centromeres are located closer to one end of the chromosome?
A) metacentric B) acrocentric C) holocentric D) anacentric
Which of the following refers to soft law?
A) It refers to law developed by judges through decisions of courts and similar tribunals rather than through legislative statutes or executive branch action. B) It is the reported decisions of selected appellate courts which make new interpretations of the law and can be cited as precedents in a process known as stare decisis. C) It refers to statements of philosophy, policy, and principle found in nonbinding international conventions that, over time, gain legitimacy as guidelines for interpreting the hard law in legally binding agreements. D) It is found mainly in treaties, and create binding rights, prohibitions, and duties.