Which one of the following types of culture media is selective and differential?
A) blood agar
B) MacConkey agar
C) phenylethyl alcohol agar
D) Thayer-Martin agar
B) MacConkey agar
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A commercial fisherman is very concerned that overfishing will result in a decrease in tuna population size, thus affecting his catches in future years. What strategy can he employ to make sure that the tuna population can be sustained in the long term?
A. He can only catch young, non-reproducing fish. B. He can only catch old fish (past the reproductive age). C. He can only catch fish at the reproductive age.
The outside of a neuron is positively charged at resting potential. Why don't negative ions exit from the cell to normalize charge across the membrane?
A. The positive charge outside the cell repels negative ions. B. There are no negative ions inside the cell. C. All of the chloride ions are already outside the cell. D. The negative charge inside the cell is carried by large proteins that cannot diffuse through the membrane.
Which of the following is responsible for maintaining the membrane potential?
a. the Na+/K+ pump b. the diffusion gradient c. the Ca2+ pump d. the H+ pump
Please match the primary categories of metabolism with the statements that most accurately describe them.
Anabolism A) Larger molecules are broken down into smaller molecules B) Larger molecules are built from smaller molecules C) All of the chemical reactions that occur in a cell