UA BSC 108 Exam 2 LATEST (2025) COMPLETE
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What is a photosynthetic An organism that makes its own food from inorganic
autotroph? ingredients.
What is the fluid inside Stroma
chloroplasts called?
What are the membranes inner and outer membranes
inside chloroplasts called?
Write the overall equation 6CO2+6H2O→C6H12O6+6O2
for photosynthesis.
What is the primary Pigments absorb certain wavelengths. They are the
function of pigments in means by which the energy of sunlight is captured for
photosynthesis? Name the photosynthesis. The primary pigment used in
primary pigment used in photosynthesis is Chlorophylla-a.
photosynthesis.
Their green color is from chlorophyll, a pigment
(light- absorbing molecule) in the chloroplasts that
Why are leaves green?
plays a central role in converting solar energy to
chemical energy.
How and where does Water enters root hair cells by osmosis.
water enter a plant?
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, 7/8/25, 10:05 AM UA BSC 108 Exam 2 LATEST (2025) COMPLETE QUESTIONS With 100% Verified Solutions, Flashcards | Quizlet
Carbon Dioxide diffuses through small holes in the
underside of leaves, called the stomata.
The light reactions take place in three stages. Name
the stages and summarize the events of each stage. 1.
Photons excite electrons in the chlorophyll of the first
photosystem. These photons are then trapped by the
primary electron acceptor. This photosystem then
How and where does replaces the lost electrons by extracting new ones
carbon dioxide enter a from water. This is the step that releases O2 during
plant? photosynthesis. 2. Energized electrons from the first
photosystem pass down an electron transport chain
to the second photosystem. The chloroplast uses the
energy released by this electron "fall" to make ATP. 3.
The second photosystem transfers its light-excited
electrons to NADP+, reducing it to NADPH.
List all products of the light reactions. carbon dioxide,
water. Glucose, oxygen
"1) Carbon Fixation- The enzyme rubisco combines
CO2 with 5-carbon sugar rubulose biphosphate
(RuBP). The unstable product formed splits into 2
molecules of 3-carbon 3-phosphoglyceric acid (3-
PGA).
2) Reduction- Energy from 6 molecules of ATP is used
to oxidize NADPH to NADP+. Six molecules of 3-PGA
The Calvin cycle has three are reduced, producing six molecules of energy-rich
main stages. Name the 3-carbon sugar G3P.
stages and summarize the 3) Release of one molecule of G3P- Five of the
events of each stage. previously created G3Ps remain in the cycle, but one
molecule is released.
4) Regeneration of RuBP - series of chemical
reactions uses energy from ATP to rearrange the
atoms of the 5 G3P molecules, (15 total carbons),
which forms 3 RuBP molecules (15 total carbons).
These will start another turn of the cycle.
"
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