BIOL 110 LAB EXAM #2 QUESTIONS WITH
CORRECT ANSWERS
stages of photosynthesis - Correct Answers -1/2. Light-dependent Reactions:
chlorophyll absorbs light energy to make carrier NADPH
3. Carbon Fixation: Carbon Dioxide, ATP and NADPH are used to synthesize organic
molecules.
structure of chloroplast - Correct Answers -outer membrane, inter membrane space,
inner membrane, thykaloid, granum (stack of thykaloid)
stroma - Correct Answers -the liquid-filled space surrounding the thylakoids inside
chloroplasts.
- where Carbon fixation occurs
Carbon fixation - Correct Answers -The initial incorporation of carbon from CO2 into an
organic compound by an autotrophic organism (a plant, another photosynthetic
organism, or a chemoautotrophic prokaryote).
-H+ and electron convert CO2 into organic matter
Anoxygenic vs. Oxygenic Photosynthesis - Correct Answers -- anoxygenic carried out
by purple and green sulfur bacteria's, etc.
- oxygenix carried out by bacteria but also algae and most land plants
- both require pigments to capture light energy
Light Independent Reactions (Calvin Cycle) - Correct Answers -set of reactions in
photosynthesis that do not require light; energy from ATP and NADPH is used to build
high-energy compounds such as sugar; also called the Calvin cycle. Limited by CO2
pigments - Correct Answers -molecules that absorb light energy in visible range
photon - Correct Answers -particle of light/bundle of energy
chlorophyll a - Correct Answers -A photosynthetic pigment that participates directly in
the light reactions, which convert solar light energy to chemical energy.
chlorophyll b - Correct Answers -accessory pigment that can absorb photons a cannot
, Both Chlorophyll A and B - Correct Answers -absorb violet-blue and red wavelengths,
reflect light in the 500 nm to 600 nm range, have Mg at the center embedded in
porphyrin ring structure
carotenoids - Correct Answers -carbon rings linked to chains with alternating single and
double bonds, captures energy not absorbed by chlorophyll and serve as a general anti-
oxidant
role of RuBP in photosynthesis - Correct Answers -reacts with carbon dioxide to make
an unstable 6 carbon compound
photosystem - Correct Answers -A cluster of pigments embedded into a thylakoid
membrane. contain antenna complex and reaction center
antenna complex - Correct Answers -A complex of hundreds of pigment molecules in a
photosystem that collects photons and feeds the light energy to a reaction center.
- aka light harvesting complex
reaction center - Correct Answers -Passes excited whole electrons out of the
photosystem
- aka transmembrane protein complex
What are outputs of mitochondrial action that serve as inputs to photosynthesis? -
Correct Answers -both carbon dioxide and water
photosynthesis - Correct Answers -combines CO2 and H20 producing glucose and O2
What does the rate of photosynthesis depend on? - Correct Answers -amount of light,
CO2 concentration, temperature
In photosynthesis, where does the Oxygen gas come from? - Correct Answers -Water
(h2o)
stages of light dependent reactions - Correct Answers -1. primary photoevent
2. charge separation
3. electron transport
4. chemiosmosis (ATP)
primary photoevent - Correct Answers -A photon of light is captured by a pigment. This
primary photoevent excites an electron within the pigment.
charge separation - Correct Answers -energy is transferred to the reaction center; an
excited electron is transferred to an acceptor molecule
CORRECT ANSWERS
stages of photosynthesis - Correct Answers -1/2. Light-dependent Reactions:
chlorophyll absorbs light energy to make carrier NADPH
3. Carbon Fixation: Carbon Dioxide, ATP and NADPH are used to synthesize organic
molecules.
structure of chloroplast - Correct Answers -outer membrane, inter membrane space,
inner membrane, thykaloid, granum (stack of thykaloid)
stroma - Correct Answers -the liquid-filled space surrounding the thylakoids inside
chloroplasts.
- where Carbon fixation occurs
Carbon fixation - Correct Answers -The initial incorporation of carbon from CO2 into an
organic compound by an autotrophic organism (a plant, another photosynthetic
organism, or a chemoautotrophic prokaryote).
-H+ and electron convert CO2 into organic matter
Anoxygenic vs. Oxygenic Photosynthesis - Correct Answers -- anoxygenic carried out
by purple and green sulfur bacteria's, etc.
- oxygenix carried out by bacteria but also algae and most land plants
- both require pigments to capture light energy
Light Independent Reactions (Calvin Cycle) - Correct Answers -set of reactions in
photosynthesis that do not require light; energy from ATP and NADPH is used to build
high-energy compounds such as sugar; also called the Calvin cycle. Limited by CO2
pigments - Correct Answers -molecules that absorb light energy in visible range
photon - Correct Answers -particle of light/bundle of energy
chlorophyll a - Correct Answers -A photosynthetic pigment that participates directly in
the light reactions, which convert solar light energy to chemical energy.
chlorophyll b - Correct Answers -accessory pigment that can absorb photons a cannot
, Both Chlorophyll A and B - Correct Answers -absorb violet-blue and red wavelengths,
reflect light in the 500 nm to 600 nm range, have Mg at the center embedded in
porphyrin ring structure
carotenoids - Correct Answers -carbon rings linked to chains with alternating single and
double bonds, captures energy not absorbed by chlorophyll and serve as a general anti-
oxidant
role of RuBP in photosynthesis - Correct Answers -reacts with carbon dioxide to make
an unstable 6 carbon compound
photosystem - Correct Answers -A cluster of pigments embedded into a thylakoid
membrane. contain antenna complex and reaction center
antenna complex - Correct Answers -A complex of hundreds of pigment molecules in a
photosystem that collects photons and feeds the light energy to a reaction center.
- aka light harvesting complex
reaction center - Correct Answers -Passes excited whole electrons out of the
photosystem
- aka transmembrane protein complex
What are outputs of mitochondrial action that serve as inputs to photosynthesis? -
Correct Answers -both carbon dioxide and water
photosynthesis - Correct Answers -combines CO2 and H20 producing glucose and O2
What does the rate of photosynthesis depend on? - Correct Answers -amount of light,
CO2 concentration, temperature
In photosynthesis, where does the Oxygen gas come from? - Correct Answers -Water
(h2o)
stages of light dependent reactions - Correct Answers -1. primary photoevent
2. charge separation
3. electron transport
4. chemiosmosis (ATP)
primary photoevent - Correct Answers -A photon of light is captured by a pigment. This
primary photoevent excites an electron within the pigment.
charge separation - Correct Answers -energy is transferred to the reaction center; an
excited electron is transferred to an acceptor molecule
