Which of the following is the direct cause of the dead zone in the Gulf of Mexico?
A. decomposition of algal blooms by aerobic
bacteria
B. eutrophication
C. fertilizer runoff from agricultural fields
D. increased growth of algal populations
E. ocean acidification
A
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This protein or protein complex functions in the cell to stop cell division if the cell has experienced extensive DNA damage:
A. APC/C B. p53 C. FtsZ D. Condensin
The animals pictured here are
1.chelicerates
2.myriapods
3.crustaceans
4.arachnids
What would be the net ?G for the coupling of these two reactions?
For a particular cell at 25°C, the concentration of sucrose is 10 mM on the inside of the cell and 0.5 mM on the outside, whereas the concentration of sodium ions (Na+) is 0.5 mM on the inside of the cell and 10 mM on the outside. The membrane potential is -150 mV. Constants: R = 1.987 cal/mol-K; T = 25°C = 298 K; F = 23,062 cal/mole-volt A) +7.007 kcal/mol B) +3.459 kcal/mol C) ?1.774 kcal/mol D) ?3.459 kcal/mol E) ?7.007 kcal/mol
What is the earliest fossil hominin?
A. Sahelanthropus tchadensis B. Ardipithecus kadabba C. Australopithecus robustus D. Australopithecus africanus E. Ardipithecus ramidus