Question

summary questions 19. what gas is used during photosynthesis? a. hydrogen b. carbon dioxide c. oxygen d. carbon monoxide 20. what happens to the rate of photosynthesis when the amount of light available increases? a. the rate of photosynthesis stays the same b. the rate of photosynthesis decreases c. the rate of photosynthesis increases 21. what happens to the amount of oxygen produced when a plant is exposed to more light? a. the amount of oxygen produced stays the same b. the amount of oxygen produced decreases c. the amount of oxygen produced increases 22. what organic molecule is produced during photosynthesis? a. cholesterol a type of lipids b. urease a type of proteins c. dna a type of nucleic acid d. glucose a type of carbohydrates 23. which step in photosynthesis requires sunlight? a. light reaction b. dark reaction c. calvin cycle d. glycolysis 24. which step in photosynthesis converts carbon dioxide into sugar? a. light reaction b. krebs cycle c. calvin cycle d. glycolysis

Explanation:

1. In photosynthesis, carbon dioxide is used as a raw - material.
2. Light is an essential factor for photosynthesis. When the amount of light available increases, the rate of photosynthesis increases as more energy is available for the light - dependent reactions which drive the overall process.
3. More light means more energy for the light - dependent reactions, which can produce more ATP and NADPH. These are used in the Calvin cycle to fix more carbon dioxide and produce more oxygen. So, the amount of oxygen produced increases.
4. Photosynthesis produces glucose, which is a type of carbohydrate.
5. The light reaction in photosynthesis requires sunlight to generate ATP and NADPH.
6. The Calvin cycle in photosynthesis converts carbon dioxide into sugar using the ATP and NADPH from the light reactions.

Answer:

1. c. Carbon dioxide
2. c. The rate of photosynthesis increases
3. a. The amount of oxygen produced increases
4. a. Glucose a type of carbohydrates
5. a. Light reaction
6. b. Calvin Cycle