Lecture 25 Word Scramble
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| Question | Answer |
| The ratio of what molecule determines the fate of pyruvate in the cell? | NADH/NAD+ |
| How many electrons do NADH and FADH2 each carry? | 2 electrons |
| What vitamin do we eat to supply our bodies with NAD+? | Niacin = Vitamin B3 |
| What vitamin do we eat to supply our bodies with FAD? | Riboflavin = Vitamin B2 |
| When converting pyruvate to lactate is 2 NADH or 2 NAD+ generated? | 2 NAD+ |
| What happens to the concentration of NADH if oxygen concentration is low? | NADH builds up in the cell because it can not donate its protons |
| What happens to the NAD+ formed when pyruvate is converted lactate? | It is used in glycolysis |
| Which tissues are capable of anaerobic glycolysis and produce lactate? | Red blood cells, muscles, liver, brain, and adipose |
| What is the purpose of making lactate? | Reduction of pyruvate to lactate produces 2 NAD+ molecules that are used to keep glycolysis going under anaerobic conditions |
| What enzyme catalyzes the reaction from pyruvate to lactate? | Lactate dehydrogenase |
| In yeast, is lactate formed from pyruvate? | No. Yeast ferments glucose to ethanol and CO2. |
| In fermentation, does conversion of acetylaldehyde to ethanol produce 2 NAD+ or 2 NADH? | 2 NAD+ |
| In fermentation, what happens to the 2 NAD+ generated during the production of ethanol? | Reduction of acetylaldehyde to ethanol produces 2 NAD+ molecules that are used to keep glycolysis going under anaerobic conditions |
| Can amino acids be used for energy in the absence of oxygen? | No. Amino acids are ultimately converted to Acetyl-CoA, which can not be used in the krebs cycle in anaerobic conditions |
| Can fatty acids be used for energy in the absence of oxygen? | No. Fatty acids are converted to Acetyl-CoA which can't be used in the krebs cycle in anaerobic conditions |
| Which tissues can use the lactate taken up from the blood as a carbon source in aerobic conditions? | Muscle, liver, brain, and red blood cells |
| Draw lactic acid | CH3-OH-CH-COOH |
| What happens to the pH of the surrounding solution if lactic acid is increased? | pH decreases: the solution ibecomes more acidic |
| Is PFK-1 positively or negatively regulated by low pH? | PFK-1 is negatively regulated by high H+(low pH) |
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bettyboucher
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