What is the ?G for the inward transport of sodium ions?
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) +5.233 kcal/mol; an endergonic reaction
B) +5.233 kcal/mol; an exergonic reaction
C) ?5.233 kcal/mol; an endergonic reaction
D) ?5.233 kcal/mol; an exergonic reaction
E) None of the above are correct.
Answer: D
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according to the Hardy-Weinberg model? A) f(A1) = 0.9997, f(A2) = 0.0003 B) f(A1) = 0.9800, f(A2) = 0.0200 C) f(A1) = 0.9700, f(A2) = 0.0300 D) f(A1) = 0.9604, f(A2) = 0.0392 E) f(A1) = 0.9600, f(A2) = 0.0400
Carboxydotrophic bacteria oxidize carbon monoxide to
A) carbon dioxide. B) methane. C) acetate. D) glucose.
Four of the following describe a bilaterally symmetrical animal. Which one is the exception?
a. It has left and right sides. b. It usually displays cephalization. c. It produces mirror images regardless of the number of "cuts" through the central axis. d. It usually has a three layer body plan. e. It can be a deuterostome.
anion or cation? potassium
What will be an ideal response?