Free nerve endings in the skin detect ____
a. steady touch
b. steady pressure
c. vibrations
d. movements of individual hairs
e. deep pressure
ANSWER: d
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Following the attachment and invasion of a microorganism, in order to be classified as a disease the microorganism must be capable of:
a. causing inflammation and tissue destruc-tion. b. creating pain and requiring antibiotic treatment. c. multiplication and dissemination to deeper tissues. d. killing the resident microbiota.
Once a virus establishes lysogeny, it may not switch to the lytic cycle at some later time.
Answer the following statement true (T) or false (F)
One double-stranded DNA molecule combined with proteins form ____________________, which is visible as
clumps or threads in the cell nucleus. Fill in the blank(s) with the appropriate word(s).
The following graph represents the concentration of cyclins over the course of the cell cycle. Which of the following statements is TRUE regarding the phase of the cell cycle where the green arrow is pointing?
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A. At this point in the cycle the cell is continuing to grow and make abundant tubulin proteins. B. At this point in the cell cycle, the cell has determined that the DNA is intact and environmental conditions are favorable for DNA replication. C. At this point in the cell cycle, DNA has already been replicated correctly and the cell is preparing for mitosis. D. At this point in the cycle the cell is determining if environmental conditions are favorable for growth and proliferation. E. At this point in the cell cycle, chromosomes have properly aligned on the metaphase plate and are beginning to separate.