We appreciate your visit to Which of the following is correct regarding metabolic pathways A The activity of most pathways is tightly regulated B Most pathways are isolated from other. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
Answer :
Final answer:
The activity of most metabolic pathways is tightly regulated, and they are interconnected rather than isolated. Anabolic and catabolic pathways can occur at the same time within cells. Metabolic pathways vary across different cell types within a multicellular organism.
Explanation:
The correct statement regarding metabolic pathways is that the activity of most pathways is tightly regulated. Metabolic pathways are a series of biochemical reactions that enable the synthesis and breakdown of molecules through processes of anabolism (building up) and catabolism (breaking down). These pathways are interconnected and are not isolated; they interact and have many common intermediates.
Moreover, anabolic pathways can occur simultaneously with catabolic pathways within cells. This is because the pathways are regulated in concert by energy status, hormones, substrate, and end-product levels, to maintain efficiency within the cell and prevent the waste of energy. This concurrent regulation helps to ensure the maintenance of homeostasis and allows for a quick adaptation to environmental changes.
Lastly, although metabolic pathways share a lot of similarities across different organisms, not all cells within a multi-cellular organism contain the exact same pathways. Some pathways may be unique to particular cell types, reflecting their specialized functions.
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Final answer:
The activity of metabolic pathways is tightly regulated. These pathways are not isolated and can operate simultaneously. They are present in all cells of a multicellular organism and can be regulated through feedback inhibition to prevent waste.
Explanation:
The correct statement regarding metabolic pathways is that 'the activity of most pathways is tightly regulated.' Metabolic pathways are series of biochemical reactions that break down complex molecules into simpler ones (catabolic pathways) or build more complex molecules from simpler ones (anabolic pathways). It's crucial to note that anabolic and catabolic pathways are not mutually exclusive and can occur simultaneously within a cell.
Importantly, metabolic pathways are not isolated entities, but are interconnected. Meaning, intermediates or products from one pathway might serve as substrates in another pathway. Moreover, these pathways are present in all cells of a multicellular organism, although their activity can vary significantly depending on the cell type and its functional role.
Feedback inhibition, where an end product of a pathway inhibits an upstream step, is a common form of regulation of metabolic pathways, ensuring the efficient use of resources within the cell. In such cases, high concentrations of the end product 'signal' the pathway to slow down or pause, preventing waste from unneeded production. This type of control underscores the dynamic nature of metabolic pathways in responding to the needs of the cell.
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