Cell Work Unit Test (Connexus) Questions With Complete Solutions.

What is the original source of energy in the food you eat? - sun Why are leaves red in the fall? - Chlorophyll breaks down because there's less sunlight. Which statement is true? - The Calvin cycle is the light-independent (does not need light) step of photosynthesis and happens in the stroma. The original energy for photosynthesis to begin comes from: - light Which equation best models cellular respiration? - C6H12O6 + 6O2 → 6H2O + 6CO2 + Energy Lactic acid fermentation can be modeled by which equation? - Pyruvic acid + NADH → Lactic acid + NAD+ In the Krebs cycle, how is citric acid formed? - Acetyl-CoA joins with a large molecule called oxaloacetic acid. The following are steps of cellular respiration except - electrolysis Which molecule provides the activation energy that starts glycolysis? (Not which molecule is broken down during glycolysis) - ATP During which phase of cellular respiration is carbon dioxide released? - Krebs cycle Which compound is a reactant in cellular respiration? - oxygenHow many O2 molecules are required for two glucose molecules to undergo cellular respiration? - 12 Which statement is true? - Ectotherms cannot insulate (stop heat loss from) their bodies and can only control their body temperature by choice. Which activity uses ATP to raise body temperature? - shivering