Which of the following drugs specifically targets cell walls that contain mycolic acid?
A) vancomycin
B) penicillin
C) methicillin
D) isoniazid
E) bacitracin
D
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The sum total of all chemical reactions that occur within an organism. Also, a specific set of chemical reactions occuring at the cellular level.
Why are deletions or insertions of nucleotides likely to be more detrimental than base substitutions?
What will be an ideal response?
Chemical equilibrium is relatively rare in living cells. An example of a reaction at chemical equilibrium in a cell would be _____
A) one in which the free energy at equilibrium is higher than the energy content at any point away from equilibrium B) one in which the entropy change in the reaction is just balanced by an opposite entropy change in the cell's surroundings C) an endergonic reaction in an active metabolic pathway where the energy for that reaction is supplied only by heat from the environment D) a chemical reaction in which both the reactants and products are not being produced or used in any active metabolic pathway at that time in the cell
In the case of the peppered moths in England, when Kettlewell set up cameras to document that more white or black moths were eaten by birds on clean or sooty trees, he was verifying which factor involved in evolution by natural selection?
A. Some individuals are better adapted to a particular environment than other individuals. B. The organisms vary in traits and that these traits may be acquired during a lifetime. C. The variation is inherited. D. More young are born than can survive, so there will always be competition.