[Answer] 49.Which of the following pathways for the transformation of cellular energy most likely evolved first? A. Cyclic photophosphorylation B. Citric acid cycle C. Calvin cycle D. C4 photosynthesis E. Glycolysis

Answer: E
49.Which of the following pathways for the transformation of cellular energy most likely evolved first? A. Cyclic photophosphorylation B. Citric acid cycle C. Calvin cycle D. C4 photosynthesis E. Glycolysis

Metabolism (/ m ə ˈ t æ b ə l ɪ z ə m / from Greek: μεταβολή metabolē “change”) is the set of life-sustaining chemical reactions in organisms.The three main purposes of metabolism are: the conversion of food to energy to run cellular processes; the conversion of food/fuel to building blocks for proteins lipids nucleic acids and some carbohydrates; and the elimination of …

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that through cellular respiration can later be released to fuel the organism’s metabolic activities.This chemical energy is stored in carbohydrate molecules such as sugars which are synthesized from carbon dioxide and water – hence the name photosynthesis …

Carbon fixation or сarbon assimilation is the process by which inorganic carbon (particularly in the form of carbon dioxide) is converted to organic compounds by living organisms.The compounds are then used to store energy and as structure for other biomolecules.The most prominent example of carbon fixation is photosynthesis ; another form known as chemosynthesis can …

Tue Oct 16 2001 14:30:00 GMT-0400 (Eastern Daylight Time) · The citric acid cycle (CAC) – also known as the T…

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