24.   Which curves on the graphs in Figure 6.3 may represen…

24.   Which curves on the graphs in Figure 6.3 may represent the temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline (basic) hot spring at temperatures of 70°C or higher?  A) curves 1 and 5 B) curves 2 and 4 C) curves 2 and 5 D) curves 3 and 4 E) curves 3 and 5

5. Which of the following is true concerning cancer cells? …

5. Which of the following is true concerning cancer cells?  A) They exhibit density-dependent inhibition when growing in culture.  B) They must be attached to a substrate to divide in culture.  C) They evade the normal controls that trigger programmed cell death.  D) They stop dividing in culture when growth factors are depleted.

11. Which of the following statements about cellular respira…

11. Which of the following statements about cellular respiration is correct?   A) Most CO2 produced during cellular respiration is released from glycolysis  B) Protons are pumped through ATP synthase by active transport   C) The final electron acceptor of the electron transport chain is NAD+   D) The final electron acceptor in the electron transport chain is oxygen