BZ 440 EXAM 2 UPDATED Questions
and CORRECT Answers
Carbon enters the plant in the form of... - CORRECT ANSWER✔✔- CO2
Carbon is fixed by the enzyme... - CORRECT ANSWER✔✔- Rubisco
Carbon is coupled to_____ to form ______ - CORRECT ANSWER✔✔- RuBP, G3P (C3
sugar)
What is the Calvin Cycle and where does it take place? - CORRECT ANSWER✔✔- Carbon
is fixed by Rubisco and coupled to RuBP to form G3P. This takes place in the chloroplast
stroma.
Describe chemiosmosis: - CORRECT ANSWER✔✔- Protons are pumped over the
membrane, creating a proton gradient. The protons flow back to the stroma via an ATP
synthase, creating ATP
Photosythnesis is part of which branch of metabolism? - CORRECT ANSWER✔✔-
Anabolism
What is the overall reaction of photosynthesis? - CORRECT ANSWER✔✔- CO2+H2O
+Light => CH2O+O2
Photosynthesis is a redox reaction, what is reduced? What is oxidized? - CORRECT
ANSWER✔✔- CO2 is reduced to sugars and H2O is oxidized to O2
What molecule is used to shuttle electrons? (usually involved in anabolic processes) -
CORRECT ANSWER✔✔- NADP+
What are the two parts of photosynthesis? - CORRECT ANSWER✔✔- Light Reactions and
Calvin Cycle
, What molecules are used by Light Reactions? Calvin Cycle? - CORRECT ANSWER✔✔-
ADP, NADP+. ATP, NADPH.
Summarize the process that takes place in Light Reactions. - CORRECT ANSWER✔✔-
Light energy is captured by pigments. Part of this energy is stored in ATP, part is used to split
H2O into O2, H+, and e-.
Summarize the process that takes place in the Calvin Cycle. - CORRECT ANSWER✔✔-
CO2 is fixed by rubisco. The CO2 is accepted by RuBP. Sugars are produced (3-CO2 in, 1-
G3P out). ATP and NADPH are used in this process.
What are the 3 phases of the Calvin Cycle? - CORRECT ANSWER✔✔- 1. CO2 fixation
2. Reduction
3. RuBP generation
Chlorophylls (a and b) - CORRECT ANSWER✔✔- Main pigments, essential for light
capture.
Carotenoids (carotenes, xanthophylls) - CORRECT ANSWER✔✔- Essential in protection of
plants from high intensity light radiation, secondary role in light capture.
2 pigments involved in sunlight capture - CORRECT ANSWER✔✔- Chlorophylls and
Carotenoids. They absorb wavelengths in the spectrum of visible light (PAR): λ = 400-700
nm. They reflect yellow and green light, while absorb blue and red light.
What is a photsystem and how do they work? - CORRECT ANSWER✔✔- Cluster of
pigments and proteins working together to harvest light photons. 2 present: PSII and PSI.
They work in series to transfer e- from H2O to NADP+
Where is the reaction center chlorophyll found and what does it do? - CORRECT
ANSWER✔✔- Found in each photosystem. Transfers e- to the primary acceptor
Explain how ATP is synthesized during light reactions - CORRECT ANSWER✔✔- Through
photophosphorylation. e- flow through the ETC. The concentration of H+ increases in the
and CORRECT Answers
Carbon enters the plant in the form of... - CORRECT ANSWER✔✔- CO2
Carbon is fixed by the enzyme... - CORRECT ANSWER✔✔- Rubisco
Carbon is coupled to_____ to form ______ - CORRECT ANSWER✔✔- RuBP, G3P (C3
sugar)
What is the Calvin Cycle and where does it take place? - CORRECT ANSWER✔✔- Carbon
is fixed by Rubisco and coupled to RuBP to form G3P. This takes place in the chloroplast
stroma.
Describe chemiosmosis: - CORRECT ANSWER✔✔- Protons are pumped over the
membrane, creating a proton gradient. The protons flow back to the stroma via an ATP
synthase, creating ATP
Photosythnesis is part of which branch of metabolism? - CORRECT ANSWER✔✔-
Anabolism
What is the overall reaction of photosynthesis? - CORRECT ANSWER✔✔- CO2+H2O
+Light => CH2O+O2
Photosynthesis is a redox reaction, what is reduced? What is oxidized? - CORRECT
ANSWER✔✔- CO2 is reduced to sugars and H2O is oxidized to O2
What molecule is used to shuttle electrons? (usually involved in anabolic processes) -
CORRECT ANSWER✔✔- NADP+
What are the two parts of photosynthesis? - CORRECT ANSWER✔✔- Light Reactions and
Calvin Cycle
, What molecules are used by Light Reactions? Calvin Cycle? - CORRECT ANSWER✔✔-
ADP, NADP+. ATP, NADPH.
Summarize the process that takes place in Light Reactions. - CORRECT ANSWER✔✔-
Light energy is captured by pigments. Part of this energy is stored in ATP, part is used to split
H2O into O2, H+, and e-.
Summarize the process that takes place in the Calvin Cycle. - CORRECT ANSWER✔✔-
CO2 is fixed by rubisco. The CO2 is accepted by RuBP. Sugars are produced (3-CO2 in, 1-
G3P out). ATP and NADPH are used in this process.
What are the 3 phases of the Calvin Cycle? - CORRECT ANSWER✔✔- 1. CO2 fixation
2. Reduction
3. RuBP generation
Chlorophylls (a and b) - CORRECT ANSWER✔✔- Main pigments, essential for light
capture.
Carotenoids (carotenes, xanthophylls) - CORRECT ANSWER✔✔- Essential in protection of
plants from high intensity light radiation, secondary role in light capture.
2 pigments involved in sunlight capture - CORRECT ANSWER✔✔- Chlorophylls and
Carotenoids. They absorb wavelengths in the spectrum of visible light (PAR): λ = 400-700
nm. They reflect yellow and green light, while absorb blue and red light.
What is a photsystem and how do they work? - CORRECT ANSWER✔✔- Cluster of
pigments and proteins working together to harvest light photons. 2 present: PSII and PSI.
They work in series to transfer e- from H2O to NADP+
Where is the reaction center chlorophyll found and what does it do? - CORRECT
ANSWER✔✔- Found in each photosystem. Transfers e- to the primary acceptor
Explain how ATP is synthesized during light reactions - CORRECT ANSWER✔✔- Through
photophosphorylation. e- flow through the ETC. The concentration of H+ increases in the
