Answer:
Earth qualifies as an inner planet.
Earth has a greater density compared to Jupiter.
Jupiter is predominantly gaseous.
Just completed the test!
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 key takeaway is that various substances have distinct biomass proportions. Variations in biomass percentages exist due to the differing elemental compositions of these substances. Each biomass is constituted by elements like carbon, hydrogen, nitrogen, and oxygen. For instance, the human body comprises 30% biomass, while the remainder consists of water. The breakdown of various elemental percentages includes carbon (12%), nitrogen (0.6%), hydrogen (62.9%), oxygen (24%), calcium (0.24%), and phosphorus (0.14%). At every level, only 10% of biomass is transferred to the next level, with the remaining 90% being dissipated as heat.
