The RB1 tumor-suppressor gene ____
a. controls the G2/M checkpoint
b. controls the G1/S checkpoint
c. is overactive in cases of retinoblastoma
d. is overactive in cases of breast cancer
e. is overactive in cases of leukemia
b
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Zonation on a rocky intertidal zone refers to the distribution of different kinds of rocks from one area to the next
Indicate whether the statement is true or false
In eukaryotes, the electron transfer chain of aerobic respiration is located ____
a. in the intermembrane space of mitochondria b. in the matrix of mitochondria c. on the inner membrane of mitochondria d. in the outer membrane of mitochondria e. throughout the cytoplasm of the cell
A mutant protist is found in which some mitochondria lack an inner mitochondrial membrane. Which of the following pathways would be completely disrupted in these mitochondria?
A) oxidative phosphorylation B) alcoholic fermentation C) glycolysis
Which microscope is best used for observing the surfaces of intact cells and viruses?
A) phase-contrast microscope B) darkfield microscope C) fluorescence microscope D) brightfield microscope E) scanning electron microscope