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PCAT Biology Autotrophic Nutrition

Subjects : pcat, biology
  • Answer 28 questions in 15 minutes.
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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. Key pathway of light reactions and involves reactions of oth photosystems

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

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

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

5. Specialized organs that are the principal sites of photosynthesis

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

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

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

9. 6CO2+ 12 H2O + light energy -> C6H12O6 + 6O2 +6H2O

10. 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

11. 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

12. 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

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

14. 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

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

16. Fluid matrix of the chloroplast

17. 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

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

19. Thylakoid stacks

20. Reduce transpiration and conserve wtaer

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

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

23. 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

24. Escape of high-energy electrons from chlorophyll molecules

25. 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

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

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

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