Multiple Choice
How does energy primarily move between living organisms in an ecosystem?
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7. Energy and Metabolism
Introduction to Metabolism
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Which of the following statements best describes catabolic pathways?
A
They require energy input to build complex molecules from simpler ones.
B
They occur only in the presence of oxygen.
C
They involve the breakdown of complex molecules into simpler ones, releasing energy.
D
They are responsible for the synthesis of ATP from ADP and inorganic phosphate.
Verified step by step guidance1
Understand the concept of catabolic pathways: Catabolic pathways are metabolic processes that break down complex molecules into simpler ones, releasing energy in the process.
Identify the key characteristics of catabolic pathways: These pathways are typically exergonic, meaning they release energy, and are involved in the degradation of molecules such as carbohydrates, fats, and proteins.
Differentiate catabolic pathways from anabolic pathways: Anabolic pathways require energy input to synthesize complex molecules from simpler ones, whereas catabolic pathways release energy by breaking down complex molecules.
Consider the role of oxygen: While some catabolic processes, like aerobic respiration, require oxygen, others, such as anaerobic respiration or fermentation, do not.
Recognize the relationship with ATP: Catabolic pathways often provide the energy needed for the synthesis of ATP from ADP and inorganic phosphate, but they themselves are not directly responsible for this synthesis.
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