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Unformatted text preview: CELLULAR RESPIRATION SUMMARY NOTE: It is expected that you have studied this topic in High School Biology. This sub- ject may not be covered in the lectures, but you are responsible for all of the information in these notes because it is important background for topics in this course, suchas muscle cell physiology (Chapter 7). Please be familiar with this material before we reach those topics in lecture. Pay special attention to bold and underlined terms. Cellular respiration is the enzymatic breakdown of glucose (C 6 H 12 O 6 ) in the presence of oxygen (O 2 ) to produce cellular energy (ATP): C 6 H 12 O 6 + 6O 2 6 CO 2 + 6H 2 O + 38 ATP THREE STAGES OF CELLULAR RESPIRATION 1. Glycolysis : (Fig. 18-2) a ten-step process that occurs in the cytoplasm converts each molecule of glucose to two molecules of pyr- uvic acid (a 3-carbon molecule) an anaerobic process- proceeds whether or not O 2 is present ; O 2 is not required net yield of 2 ATP per glucose molecule net yield of 2 NADH per glucose (NADH is nicotine adenine dinucleotide, a co-enzyme that serves as a carrier for H + ions liberated as glucose is oxidized.) The pyruvic acid diffuses into the inner compartment of the mitochondrion where a transition reaction (Fig. 18-3) occurs that serves to prepare pyruvic acid for entry into the next stage of respiration: (a) pyruvic acid...
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This note was uploaded on 08/22/2011 for the course CHEMISTRY 101 taught by Professor Jameslee during the Three '09 term at Victoria AU.
- Three '09