Answer:
Option (A).
Explanation:
The lac operon system in bacteria elucidates the process of lactose metabolism within the cell. The initial operon system was identified by Jacob and Monod. An operon is characterized as a cluster of genes transcribed together as a single RNA unit.
When both glucose and lactose are available in the media, the bacterium favors metabolizing glucose. The presence of glucose is recognized by the bacterial cell as the CAP-cAMP complex is essential for transcription, and its levels are reduced in glucose's presence. This mechanism effectively halts the transcription of lactose genes even when lactose is available.
Consequently, the right answer is option (A).
The answer is B. Animal cells lack a cell wall, while the shoebox signifies the cell wall. I hope this information has been helpful![[TAG_1]]
During photosynthesis, the surplus food generated by the plant is stored within the ground tissue.
They demonstrate resilience. In 1988, Yellowstone National Park experienced wildfires that engulfed over a million acres and adjacent territories. However, after three decades, the park's forests have started to regenerate. This recovery stems from the resilient ecosystems, characterized by species that are adapted to endure periodic severe wildfires. Provided there is sufficient water, these plants will regrow. The lodgepole pines that burned in the wildfires are not fire-resistant, but their regrowth over the years illustrates resilience.
