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Biology - chapter 8
cellular respiration
| Question | Answer |
|---|---|
| Glycolysis: starting molecule, where does it take place? How many ATP are produced? How many are put in? | glucose (broken in half to produce 2 molecules of pyruvic acid) ; takes place in cytoplasm ; 4 ATP are produced ; 2 are put in |
| Fermentation: how does it fit in here? What happens? Why does it happen? | when oxygen is not present, follows glycolysis. cells convert NADH to NAD+ by passing high e e- back to pyruvic acid. this converts NADH back into the electron carrier NAD+ --> allows glycolysis to continue producig a steady supply of ATP |
| Krebs: how does it work? What do we get out of it? How many ATP are produced? | when oxygen is present. pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions ; CO2 & 1 molecule of ATP produced directly to be used in cellular activities; |
| Electron Transport Chain: how does it work? What do we get out of it? How many ATP are produced? | uses high energy e- from Krebs cycle to convert ADP to ATP; at the end - enzyme combines H+ and oxygen to form water; eventually, ATP synthase spins and grabs a low-energy ADP,attaches to a phosphate group --> ATP |
| Total: How much ATP is produced after glycolysis? After ETC? How much total with and without oxygen? | After glycolysis: 4 ATP produced After ETC: 1 With oxygen: 34 ATP Without: 2 ATP -- 36 ATP -- |
| Where does it take place? | cytoplasm --> inner folds of mitochondria |
| How does oxygen participate in this process? | with oxygen - go to Krebs cycle - 34 ATP without oxygen - go to fermentation - 2 ATP |
| Fermentation Lab: what were we trying to find out? | Trying to measure the pressure change caused by carbon dioxide released during fermentation; determine the rate of fermentation; determine which sugars yeast can metabolize found out glucose rate of fermentation:0.4690 sucrose rate of fermentation:1.08 |
| What are the types of fermentation? who participates in each type? | lactic acid fermentation & alcoholic fermentation |
| (lab) What did we find out? How are rates affected? How can you tell? | sucrose rate of fermentation:1.087 dextrose: 0.01495 lactose: -0.0243 fructose: 0.2699 yeast utilizes fructose best and lactose worst. it does not utilize all the sugars equally well bc the sugars that had a higher fermentation rate are utilized bette |
Created by:
forever09
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