Cyanide poisons mitochondria by blocking the final step in the electron transport chain. Human red blood cells placed in an isotonic solution containing cyanide are likely to _____
A) retain the normal cell shape, but the mitochondria will be poisoned
B) lyse as the cyanide concentration increases inside the cell
C) switch to anaerobic metabolism
D) become unable to carry oxygen
E) be unaffected
Answer: E
You might also like to view...
Members of the ____ subphylum are mostly insects and were among the first animals to colonize terrestrial habitats
a. Myriapoda b. Trilobita
c. Chelicerata d. Hexapoda e. Crustacea
The correct sequence for the phases of the cell cycle, starting with a newly divided cell, is
A. replication - binary fission - cytokinesis. B. cytokinesis - replication - interphase - mitosis. C. interphase - mitosis - cytokinesis. D. interphase - binary fission - cytokinesis. E. cytokinesis - mitosis - interphase.
Which protozoan group consists solely of parasitic forms?
A) apicomplexans B) ciliates C) flagellates D) amoebas
Water is most dense and thus heaviest at 4°C. At 0°C, ice forms and can float on liquid water. Suppose ice were most dense at 0°C. What would happen in a lake at this temperature?
A. The ice would cover the surface of the aquatic system and would never melt. B. The ice would cover the bottom of the aquatic system and would build up in layers over time. C. The cold temperatures and the subsequent ice formation would prevent hydrogen bonds from forming between the water molecules, thus causing the existing ice crystals to become disassociated from each other. D. Ice would not form because solids are always less dense than liquids.