Which of the following requires eIFs for initiation?
A) E. coli translation
B) chaperonin activity
C) eukaryotic translation
D) eukaryotic transcription
E) DNA replication
C) eukaryotic translation
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The lacZ and lacY genes are transcribed when:
A. lactose is present, regardless of the level of glucose in the cell. B. lactose is absent and glucose levels are high. C. lactose is present and glucose levels are low. D. glucose levels are high and lactose levels are low. E. glucose levels are low, regardless of the level of lactose in the cell.
During the water cycle, water evaporates from plants through a process called transpiration. Which similar process occurs during the carbon cycle?
A) Carbon dioxide is absorbed by soils. B) Carbon-based sugars are ingested by animals. C) Carbon dioxide is respired by animals. D) Carbon dioxide is absorbed by plants and converted to sugars.
Once an organism is placed in a specific species, the designation cannot be changed
Indicate whether the statement is true or false
Long necks make it easier for giraffes to reach leaves high on trees, while also making them better fighters in "neck wrestling" contests. In both cases, which kind of selection appears to have made giraffes the long-necked creatures they are today?
A. Directional selection B. Stabilizing selection C. Disruptive selection