Question

1. a student sets up an experiment with elodea plants under bright light. she measures the gases being released. which gas is the plant releasing during photosynthesis?
2. match the process to the type of energy conversion it performs:

• photosynthesis: converts light energy into chemical energy in glucose
• cellular respiration: converts chemical energy (atp) into usable energy (glucose)

1. which statement compares photosynthesis and cellular respiration?

• a. photosynthesis stores energy in glucose while cellular respiration releases energy from glucose.
• b. photosynthesis directly captures sunlight and releases atp while cellular respiration takes place only in chloroplasts.
• c. both photosynthesis and cellular respiration convert oxygen gas into glucose.
• d. both processes release energy.

1. fill - in table:

• process: photosynthesis, cellular respiration
• main inputs: light energy +, oxygen +
• main outputs: glucose +, atp +

1. name the cell organelle where each process mainly takes place:

• photosynthesis:
• cellular respiration:

1. a plant is left in complete darkness for 24 hours. explain what will happen to its photosynthesis rate and its cellular respiration rate during that time.
2. why would an athletes muscle cells have more mitochondria than a skin cell? relate your answer to cellular respiration.

Explanation:

1. Photosynthesis is the process by which plants convert light energy into chemical energy in glucose. Cellular respiration converts the chemical energy in glucose into usable energy (ATP).
2. Photosynthesis main inputs are light energy, carbon - dioxide and water. Main outputs are glucose and oxygen. Cellular respiration main inputs are glucose and oxygen, main outputs are carbon - dioxide, water and ATP.
3. Option B is correct as photosynthesis stores energy in glucose while cellular respiration releases energy from glucose.
4. Photosynthesis: Main Inputs - Light energy, carbon - dioxide, water; Main Outputs - Glucose, oxygen. Cellular Respiration: Main Inputs - Glucose, oxygen; Main Outputs - Carbon - dioxide, water, ATP.
5. Chloroplast is the organelle where photosynthesis mainly takes place.
6. Cellular respiration occurs in mitochondria.
7. In 24 hours, during the day when there is light, photosynthesis and cellular respiration both occur. At night, only cellular respiration occurs as there is no light for photosynthesis.
8. An athlete's muscle cells have more mitochondria than a skin cell because muscle cells require more energy for physical activity, and mitochondria are the power - houses of the cell where cellular respiration occurs to produce ATP.

Answer:

1. Photosynthesis converts light energy into chemical energy in glucose, cellular respiration converts chemical energy in glucose into ATP.
2. Photosynthesis: Inputs - Light + Carbon - dioxide+Water; Outputs - Glucose + Oxygen. Cellular Respiration: Inputs - Glucose + Oxygen; Outputs - Carbon - dioxide+Water + ATP.
3. B. Photosynthesis stores energy in glucose while cellular respiration releases energy from glucose.
4. Photosynthesis: Inputs - Light energy, carbon - dioxide, water; Outputs - Glucose, oxygen. Cellular Respiration: Inputs - Glucose, oxygen; Outputs - Carbon - dioxide, water, ATP.
5. Chloroplast.
6. Mitochondria.
7. During the day, both photosynthesis and cellular respiration occur. At night, only cellular respiration occurs.
8. Muscle cells need more energy for physical activity, and mitochondria produce ATP through cellular respiration.