AP Biology Photosynthesis Questions and Standards
AP Biology Photosynthesis Questions and Standards
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1982
1986
PHOTOSYNTHESIS QUESTION 1982: L. PETERSON/ECHS
Describe the similarities and differences between the biochemical pathways of aerobic respiration and photosynthesis in eukaryotic cells. Include in your discussion the major reactions, the end products, and energy transfers.
STANDARDS: 7 points Maximum for Photosynthesis section
7 points Maximum for Respiration section
PHOTOSYNTHESIS:
___Conversion of light energy to chemical energy
___Fixation of CO2
___Occurs in chloroplasts
___Split H2O (photolysis)
___Chlorophyll needed
___ATP in light reaction
___NADPH2 produced
___Anabolic (Constructive)
___Oxygen released
LIGHT REACTION (Diagram and/or Discuss)
___Photosystem I & II
___Energy "input" (electron flow)
___Chemiosmotic
DARK REACTION (CO2 FIXATION)
___Carboxylative phase
___Reductive phase
___Regenerative phase
NET REACTION
___ENERGY + CO2 + H20 -> C6H12O6 = O2
___"Uphill" Reaction - possess more free energy and/or stores 686,000 cal/mole glucose
___Coupling of light and dark reactions
RESPIRATION
___Conversion of chemical energy to metabolic
___Release of CO2
___Occurs in mitochondria
___Form H2O (reduction)
___Cytochromes needed
___ATP in oxidative phosphorylation
___NADH produced
___Catabolic (destructive)
OXIDATIVE PHOSPHORYLATION (Diagram and/or Discuss)
___ETS (NAD, FAD, cytochromes)
___Energy "release" (electron flow)
___Chemiosmotic
___Glycolysis
___Krebs Cycle
NET REACTION
___O2 + C6H12O6 -> CO2 + H2O + ENERGY
___"Downhill"Reaction - possess less free energy and/or releases 686,000 cal/mole glucose
BONUS POINTS 3 points MAX
___Dark reaction is reverse of anaerobic glycolysis
___Both processes are complementary and/or supply materials for each other
___Thorough contrast of photosynthesis and cellular respiration
PHOTOSYNTHESIS QUESTION 1986: L. PETERSON/ECHS
Describe the light reactions of photosynthesis and, for both a C3 and a C4 plant,
trace the path of a carbon dioxide molecule from the point at which it enters a
plant to its incorporation into a glucose molecule. Include leaf anatomy and bio-
chemical pathways in your discussion of each type of plant.
STANDARDS:
LIGHT REACHTIONS: Max. = 9 points
__ Light required
__ Light reactions on thylakoids (in grana)
__ Cyclic and non-cyclic photophosphorylation/photosystems I & II
__ H2O used/split/required
__ Chlorophyll absorbs light
__ Quality of light/color of light/wavelength of light must be correct
__ Chlorophyll e-s excited/boosted to higher orbit
__ Energy of e-s used to make ATP
__ Chemiosmotic photophosphorylation/Mitchell hypothesis (proton gradient)
__ Energy of e-s used to make NADPH+
__ ADP or NADP used
__ Carrier molecules for ATP or NADPH+ production
__ Electrons of P700 replaced ................
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