Photosynthesis Vocabulary
Across
- 1. one of two light-harvesting units of a chloroplast's thylakoid membrane; it uses the P680 reaction-center chlorophyll.
- 2. a green pigment found in the chloroplasts of plants, algae, and some bacteria
- 3. a quantum, or discrete amount, of light energy.
- 4. enzyme that catalyzes the first step of the Calvin cycle
- 7. a dark-green plant pigment having a brilliant green alcohol solution
- 8. and NADPH, evolving oxygen in the process.
- 9. light-collecting units of the chloroplast
- 11. the steps in photosynthesis that occur on the thylakoid membranes of the chloroplast and that convert solar energy to the chemical energy of
- 15. the incorporation of carbon from carbon dioxide into an organic compound by an autotrophic organism.
- 18. that portion of the electromagnetic spectrum detected as various colors by the human eye, ranging in wavelength from about 380 nm to about 750
- 20. instrument that measures index of light reflection
- 21. the distance between crests of waves, such as those of the electromagnetic spectrum.
- 22. yellow and orange plant pigments that aid in photosynthesis
- 24. the entire frequency range of electromagnetic waves
- 25. plant that carries out crassulacean acid metabolism; carbon is initially fixed into organic acids at night in the reaction of CO2 and phosphoenolpyruvate, catalyzed by PEP carboxylase; during the day the acids break down to yield CO2, which enters the Calvin cycle.
- 26. the small openings on the undersides of most leaves through which oxygen and carbon dioxide can move
- 27. the second of two major stages in photosynthesis (following the light reactions),involving atmospheric CO2 fixation and reduction of the fixed carbon into carbohydrate.
- 28. nicotinamide adenine dinucleotide phosphate, an acceptor that temporarily stores energized electrons produced during the light reactions.
Down
- 1. the process of adding a phosphate group to ADP to make atp;cells use the energy released by ATP to power essential activities
- 5. a type of photosynthetic cells arranged into tightly packed sheaths around the veins of a leaf
- 6. one of two light-harvesting units of a chloroplast's thylakoid membrane; it uses the P700 reaction-center chlorophyll.
- 10. a plant that uses the Calvin cycle for the initial steps that incorporate co2 into organic material, forming a three-carbon compound as the first stable intermediate.
- 12. specialized ground tissue that makes up the bulk of most leaves; performs most of a plant's photosynthesis
- 13. organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer
- 14. the range of a pigment's ability to absorb various wavelengths of light.
- 16. a plant that prefaces the Calvin cycle with reactions that incorporate co2 into a four-carbon compound, the end product of which supplies CO2 for the
- 17. an organism that obtains organic food molecules by eating other organisms or their byproducts and that cannot synthesize organic compounds from inorganic materials
- 19. process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches
- 23. a metabolic pathway that consumes oxygen, releases carbon dioxide, generates no ATP, and decreases photosynthetic output; generally occurs on hot, dry, bright days, when stomata close and the oxygen concentration in the leaf exceeds that of carbon dioxide.
- 25. cycle.
- 27. a blue-black plant pigment having a blue-green alcohol solution