Question

name: biol 105 exam 2 21. energy lost from a biological organism is usually lost as: a. glucose. b. co₂. c. oxygen. d. heat. 22. chlorophyll pigments absorb __, which in turn excite , which then are used in reactions to gene a. protons; photons; atp b. protons; electrons; atp c. photons; electrons; atp d. photons; electrons; protein 23. the most common end product of photosynthesis is: a. biofuels. b. ethanol. c. glucose. d. lactic acid. 24. which equation describes photosynthesis? a. sunlight + h₂o + co₂ → o₂ + glucose b. sunlight + co₂ → o₂ + h₂o + glucose c. sunlight + o₂ → co₂ + h₂o + glucose d. sunlight + glucose + co₂ → o₂ + h₂o 25. what is the carbon source used in photosynthesis? a. glucose b. carbon monoxide c. carbon dioxide d. organic carbon 26. the organelle responsible for carrying out photosynthesis is the __. a. golgi apparatus b. chloroplast c. lysosome d. ribosome 27. the first stage of photosynthesis converts sunlight energy into: a. heat. b. glucose. c. chemical energy. d. kinetic energy.

Explanation:

1. Energy in biological organisms is lost as heat during metabolic processes.
2. Chlorophyll absorbs photons which excite electrons to generate ATP.
3. Glucose is the most common end - product of photosynthesis.
4. Photosynthesis uses sunlight, water and carbon dioxide to produce oxygen and glucose.
5. Carbon dioxide is the carbon source for photosynthesis.
6. Chloroplasts are the organelles where photosynthesis occurs.
7. The first stage of photosynthesis (light - dependent reactions) converts sunlight energy into chemical energy in the form of ATP and NADPH.

Answer:

1. d. heat
2. c. photons; electrons; ATP
3. c. glucose
4. a. sunlight + H₂O + CO₂ → O₂ + glucose
5. c. carbon dioxide
6. b. chloroplast
7. c. chemical energy