which occurs during the krebs cycle? 1) breaking down pyruviate 2) capturing light energy 3) creating glucose molecules 4) producing ethyl alcohol ?
Your teacher is too easy. Three of the choices are lubricious. http://www.austincc.edu/emeyerth/krebs.htm
The correct answer is 1) breaking down pyruvate.
To arrive at this answer, we can analyze each option:
1) Breaking down pyruvate: This process occurs during the Krebs cycle, also known as the citric acid cycle or the tricarboxylic acid cycle. In this cycle, the pyruvate that is produced during glycolysis undergoes further oxidation and is converted into carbon dioxide, generating energy-rich molecules such as ATP and reduced electron carriers (NADH and FADH2).
2) Capturing light energy: This process is part of photosynthesis, specifically in the light-dependent reactions that occur in the thylakoid membrane of chloroplasts, not during the Krebs cycle.
3) Creating glucose molecules: This process is known as gluconeogenesis and occurs mainly in the liver. It is the synthesis of glucose from non-carbohydrate precursors, such as amino acids or glycerol. It does not occur during the Krebs cycle.
4) Producing ethyl alcohol: This process is part of fermentation, specifically in yeast cells. It involves the conversion of pyruvate into ethyl alcohol (ethanol) and carbon dioxide, not during the Krebs cycle.
Therefore, the correct answer is 1) breaking down pyruvate.