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Stages Of Cellular Respiration In Plants

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All of the following compounds are required at some stage of cellular respiration in plants, except
A. NAD.
B. sugar.
C. adenosine diphosphate.
D. oxygen.
E. carbon dioxide.
Cellular respiration occurs in both plant and animal cells. Both types of cells are very similar, containing similar organelles such as the mitochondria. The mitochondria is the site of cellular respiration, where glucose and oxygen can be used to produce ATP and carbon dioxide. In plant cells energy is created through the process of photosynthesis, the conversion of energy from the sun into chemical energy. Autotrophs are able to utilize photosynthesis to sustain themselves without consuming food to obtain energy. The site of photosynthesis takes place in the cell’s chloroplast (Citovsky, Lecture 20). A large, concentrated portion of chloroplast can be found within the plant’s mesophyll, the interior of a leaf. Photosynthesis is broken down into two stages: light reactions and the Calvin cycle. Through light reactions, solar energy can be converted into chemical energy (Campbell, pg. 189). In the Calvin cycle, usable energy in the form of sugars are synthesized from carbon dioxide.
Choice A – NAD is incorrect. NAD+ (nicotinamide adenine dinucleotide) is a coenzyme which functions as an intermediate for energy transport during cellular respiration (Citovsky, Lecture 18). In the first phase of photosynthesis, light reactions, solar energy is converted into NADP+ (nicotinamide adenine dinucleotide

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