If lambda phage were unable to express the Cro repressor protein, what would happen?
a. It would be unable to integrate its viral DNA into the host's chromosome.
b. It would be unable to maintain the lysogenic pathway.
c. It would never enter the lytic pathway.
d. It would not be able to express any genes in its genome.
Answer: C
You might also like to view...
A scientist has tracked the population sizes of wolves and caribou within a national park. Assuming that there are no other prey species available to the wolves, how will the wolf and caribou populations change over time?
A. The wolf population will increase as caribou numbers increase (although there will be a slight lag). B. The wolf population will increase exponentially, regardless of the caribou population. C. The wolf population will decrease as caribou numbers increase (although there will be a slight lag). D. The wolf population will fluctuate between high and low levels, but this will be independent of the caribou population. E. The wolf and caribou populations will fluctuate periodically, and the graphs of their population size will match exactly (i.e., there is no lag).
Zero population growth is achieved when ____
a. a population reaches the carrying capacity of the environment b. emigration and immigration are balanced, and the number of births equals the number of deaths c. births exceed deaths d. deaths exceed births e. emigration and immigration are prevented
Eukaryotic sexual life cycles show tremendous variation. Of the following elements, which do all sexual life cycles have in common?
I. Alternation of generations II. Meiosis III. Fertilization IV. Gametes V. Spores A) I, II, and IV B) II, III, and IV C) II, IV, and V D) I, II, III, IV, and V
What types of energy are utilized by a child swinging on a swing?
a. chemical energy only, because it is the child's metabolism that powers the muscles that make the swing move b. kinetic, potential, and chemical energy: the child powers the swing with chemical energy in the muscle cells, and the swing moves like a pendulum with changing ratios of kinetic and potential energy c. kinetic and potential energy only, but in constantly changing ratios: when changing direction, the energy is pure potential energy, but at the bottom of the arc, the energy is pure kinetic energy d. kinetic energy only, because the child is in constant motio