What genes appear to be controlled by the Xic?
A. Xist and Tsix
B. Xist only
C. Tsix only
D. None of these
A
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Which of the following are most susceptible to complement lysis?
A. Gram-positive bacteria B. Gram-negative bacteria C. Bacteriophages D. Prions
According to the first law of thermodynamics,
a. the energy of a system may increase if there is a corresponding decrease in energy elsewhere in the universe. b. the amount of energy in the universe is constant. c. chemical reactions do not create or destroy energy. d. energy can change from one form to another. e. all of these are true.
Suppose that a patient presents the following symptoms: anemia, dilation of heart, lung damage and pneumonia, rheumatism, abdominal pain, and kidney failure. After learning about the patient's family history, which disorder did the doctor run a genetic test for?
a. cystic fibrosis b. albinism c. sickle cell disease d. achondroplasia
In the human knee-jerk reflex of a seated individual, as the calf is raised from a vertical position to a horizontal position, the muscles of the quadriceps (on the front of the thighs) and the muscles of the hamstring (on the back side of the thighs
) are _____. A) both excited and contracting B) both inhibited and relaxed C) excited and inhibited, respectively D) inhibited and excited, respectively