Which of the following is not true about cervical cancer, which is a relatively common cancer?
a. It can be detected early by a PAP test.
b. It is usually caused by human papillomavirus (HPV).
c. It causes the cervical cells to make peptide E7, which disrupts the cell cycle.
d. It spreads by blocking the retinoblastoma protein RB.
e. It usually remains localized.
Ans: e. It usually remains localized.
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What is the specific role of cyanobacteria (or green algae) in lichens?
A. to help attach the lichens to surfaces B. to synthesize defensive compounds C. to provide fungi with nutrients in usable forms D. to transport water throughout lichens E. Cyanobacteria and green algae play no role in lichens, as lichens consist of fungi.
The main DISADVANTAGE of excessive gluconeogenesis during prolonged postabsorptive periods is that
A. continued protein breakdown can impair enzymatic activity and plasma membrane functions. B. carbohydrate buildup in the liver impairs its function. C. the brain is exposed to levels of glucose that are too high. D. tissues other than the brain increase glucose utilization. E. glucose absorption from the gut is impaired.
In order for a girl to inherit hemophilia A, her parents would have which genotypes? Select one:
a. XHXH, and XHy b. XHXh, and XhY c. XhXh, and XHy d. XHXH, and XHY e. XHXh, and XHY
Protospacer adjacent motifs, PAMs, allow bacteria to do which of the following?
A) recognize and digest foreign DNA B) recognize proper spacing for bacterial transcription initiation C) recognize and integrate foreign DNA D) recognize and digest their own DNA