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PCAT Biology Autotrophic Nutrition

Subjects : pcat, biology
Instructions:
  • Answer 28 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Use ATP and NADPH produced by the light reactions to reduce CO2 to carbohydrates - primarily glucose (only occur during the day when the light reactions are replenishing the supply of ATP and NADPH -aka carbon-fixation or reduction synthesis reaction






2. The light capturing unit of the thylakoid membrane which is composed of a number of chlorophyll molecules






3. Reduce transpiration and conserve wtaer






4. Escape of high-energy electrons from chlorophyll molecules






5. Incorporate CO2 into organi molecules in a process called carbon fixation






6. CO2 is the source of carbon for carbohydrate production -product is three-carbon sugar phosphoglyceraledhyde (PGAL) -Similar to Krebs cycle in reverse






7. Key pathway of light reactions and involves reactions of oth photosystems






8. Openings in the lower epidermis of a leaf that permit diffusion of CO2 - H2o - and oxygen






9. Thylakoid stacks






10. Bacteria form carbohydrates by Use of chemical energy rather than by using the radiant energy of the sun






11. Specialized organs that are the principal sites of photosynthesis






12. Excited e- of P700 move along a chain of electron carriers -reactions are harnessed to produce ATp from ADP and Pi in a process called cyclic photophosphorylation






13. 6CO2+ 12 H2O + light energy -> C6H12O6 + 6O2 +6H2O






14. Stomata open into air spaces that contact an internal moist surface of loosely packed songy layer cells.






15. One of the early e- carriers in the cyclic photophosporlylation






16. Regulate the size of stomata opening - which open during the day to admit CO2 for photosynthesis and close them at night to limit loss of water






17. Layer of elongated - chloroplast-containing cells spread over a large surface area. they are directly under the upper epidermis and are well expoed to light






18. Fluid matrix of the chloroplast






19. Contain xylem and phloem bring water to the leaf from the roots (xylem) and carry manufactured food out of the leaf (phloem)






20. Speicalized epidermal cells with thin-walled rot haris are found in the root and provide an increased surface for absorption of wtaer and minerals by diffusion and active transport






21. 1) carbon dioxide is fed into the cycle; in the Krebs cycle it was produce and released 2) reducing power is used during the cycle (NADPH); in the Krebs cycle NADH was removed 3) energy is used in the cycle (conversion of ATP to ADP); in the Krebs cy






22. Highly organized plastid containing the chlorophyll pigment that is bounded by two membranes and contains a netowrk of membranes called thylakoid membranes






23. Any organism that manufactures its own organic molecules (glucose - amino acids - and fats) from inorganic materials (CO2 - H2O - and mineral salts).






24. Surround each of the stomata on the lower surface of the leaves






25. Special chlorophyll molecule is P680 because it absorbs best at 680 nm






26. Metabolic process where solar energy is trapped - converted to chemical energy - and then subsequently stored in the bonds of plant organic nutrient molecules and takes place in chloroplasts






27. Chlorphyll a molecule is called P700 because it absorbed best at 700nm






28. Convert solar energy into chemical energy in the form of ATP (by photophosphorylation) and NADPH and must take place in light