1. Yesterday you were explaining colors in an essay to your science teacher. You expounded for your science teacher, Mrs. Greene, that most plants appear green because chlorophyll (the principal pigment in plants)... ...reflects violet light. ...refracts red light. ...absorbs green light. ...does not absorb green light.

2. Tomorrow you will be collecting the gas given off from a plant in bright sunlight at a temperature of 27 degrees Celsius. The gas to be collected will probably be... ...oxygen. ...vaporized water. ...ATP. ...carbon dioxide.

3. Pretend that in 300 years, science class with Mrs. Greene will consist of students becoming plants for an hour! These plant-students would have to gather the sun's energy with light-absorbing molecules called... ...pigments. ...chloroplasts. ...thylakoids. ...glucose.

4. You're the smartest person in Mrs. Greene's class! Today you participated and accurately stated that the overall equation for photosynthesis is six molecules of ______ _______ plus six molecules of water (with the energy of light) produce one molecule of glucose and six molecules of oxygen. Answer: (Two Words)

5. Mrs. Greene asked you how the Calvin cycle differs from light-dependent reactions. What could you say? It takes place in the stroma. It takes place in the chloroplasts. It requires light. It takes place in the thylakoid.

6. You thought you had memorized what happened during the reactions of photosynthesis, but Mrs. Greene took off one point from your homework, saying that "Not all of these are steps in the light-dependent reactions". Which is NOT a step in the light-dependent reactions? ATP synthase (a protein that allows hydrogen molecules to pass throughthe thylakoid membrane) allows hydrogen ions to pass through the thylakoid membrane. High-energy electrons move through the electron transport chain. Pigments in photosystem II absorb light. ATP (a principal chemical compound cells use to store/release energy) and NADPH (an electron carrier) are used to produce high-energy sugars.

7. In 300 years, students not only will turn into plants for an hour, but will be able to conduct experiments on other planets! The newly discovered planet Q will be identical to Earth, except for the complete absence of carbon dioxide. (Minor detail, right?) But if carbon dioxide is completely removed from a plant's environment, what would you expect to happen to the plant's production of high-energy sugars? Carbon dioxide does not affect the production of high-energy sugars in plants. More sugars will be produced. No sugars will be produced. The same number of sugars will be produced.

8. Mrs. Greene tells you that a chloroplast (a photosynthetic organelle) contains stroma (where the Calvin cycle or light-independent reactions take place). A thylakoid (saclike photosynthetic membrane) contains chlorophyll (a plant's principal pigment). A granum (stack of thylakoids) contains several thylakoids. But wait- is the stroma the space outside the thylakoid membranes? Yes No

9. Mrs. Greene required that every student place a plant in a heated oven as a homework assignment. What would you expect to happen to plants at temperatures greater than 45 degrees Celsius? They will have a very high rate of photosynthesis. They will have a less than optimal rate of photosynthesis. They will have an optimal rate of photosynthesis if water is available. They will have a high rate of photosynthesis if light intensity is also great.

10. Suppose, as a long term project, you are trying to recreate your favorite scientist's experiment. You light a candle and watch the flame gradually go out when you put a glass jar over it. Then you place a live sprig of mint under the jar and notice that the candle flame burns longer. Whose experiment did you recreate? Melvin Calvin (who worked out the details of the light-independent reactions) Jan van Helmont (who found that plant's gain most of their mass from water) Joseph Priestly (who found that plants release oxygen) Jan Ingenhousz (who found that plants only produce oxygen when exposed to light)