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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. Reduce transpiration and conserve wtaer

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

4. 6CO2+ 12 H2O + light energy -> C6H12O6 + 6O2 +6H2O

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

6. Specialized organs that are the principal sites of photosynthesis

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

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

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

10. Thylakoid stacks

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

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. 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

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

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

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

18. 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

19. Fluid matrix of the chloroplast

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

21. 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

22. Escape of high-energy electrons from chlorophyll molecules

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

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

25. 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

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

27. 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

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