Angiogenesis contributes to carcinogenesis because it
A. allows tumor cells to invade underlying tissues.
B. causes additional mutations to occur in tumor cells.
C. allows tumor cells to spread to other parts of the body.
D. causes blood vessels to grow into the tumor.
E. causes apoptosis in tumor cells.
Answer: D
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According to the table and the figure above, which enzyme is defective in the strain with the arg2 mutation?
A) the enzyme that converts the precursor to ornithine B) the enzyme that converts ornithine to citrulline C) the enzyme that converts citrulline to arginine D) the enzyme that converts the precursor to citrulline
The equation, 6CO2 + 6H2O ?C6H12O6 + 6O2, describes which of the following processes?
A. light reaction B. nitrogen fixation C. photosynthesis D. Calvin cycle E. aerobic respiration
In order to produce human insulin in bacteria what must be done first?
A. Human insulin protein is purified from the bacteria. B. The human insulin gene must be cloned. C. The human insulin gene must be transformed into bacteria. D. Bacteria containing the human insulin gene are grown. E. The bacterial insulin gene must be cloned.
In the accompanying figure, what would structure A be made up as a gram-negative bacterium?
a. cellulose b. plasmids c. spirochetes d. peptidoglycan e. monosaccharides