4.1 Introduction to Cellular Respiration and Fermentation

hasanahatesscience's version from 2018-03-31 19:45

Section 1

Question Answer
what is Aerobic cellular respirationprocess that extracts energy from food in the presence of oxygen. The energy is used to synthesize ATP from ADP and P. The ATP molecules are then used to supply energy directly to the cells.
where does aerobic cell. resp take place?in eukaryotes, barely any prokaryotes
Can be divided into 4 stages:Glycolysis, PO, krebs, ETC.
Each stage involves the transfer of free energy producing ATP into in one of the 2 waysSubstrate level phosphorylation and Oxidative phosphorylation
This is a series of 20 redox reactions where product of one reactionis the reactant for the next. each reaction is catalyzed by a specific enzyme

Section 2

Question Answer
substrate level phosphorylationdirection production of ATP through coupled reaction.
a molecule with a phosphate group donates its phosphate group to ADP to form ATp

Section 3

Question Answer
what is oxidative phosphorylationindirect production of atp through series of enzyme catalyzed redox reactions involving oxygen as final electron accepter
process of cellular respirationin eukaryotic cells (mitochondria)
electrons are transferred from glucose to NAD+ yields NADH and FAD+, giving FADH2 during glycolysis, pyruvate oxidation and the krebs cycle
in the electron transport chainelectrons from NADH and FADH2 are transffered to oxygen to form water

Section 4

Question Answer
anaerobic cellular respirationoccurs in absense of oxygen. this means oxygen is not the final electron accepter
does not involve themitochondria
process takes place inthe cytosol
redocued amounts of Atp are productedresults in the production of lactic acid (animals) or ethanol (yeast/bacterial cells). Fermentation relies on an organic compound

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