WorksheetsPhotosynthesis
Total questions: 73
Worksheet time: 37mins
Plants and other autotrophs are producers of...
Biosphere
Ecosystem
Ecology
Biology
_____use light energy to make organic molecules
Photoautotrophs
Heterotrophs
Omnivores
Dinosaurs
Heterotrophs consume organic molecules from other organisms for energy and carbon
True
False
Photosynthesis converts ______ energy to _______ energy of food
Light; potential
Chemical; light
Light; chemical
Kinetic; Potential
What are the sites of photosynthesis in plants?
Granum
Thylakoids
Stroma
Chloroplasts
Mesophyll are chloroplasts mainly found in leaf cells
True
False
What are pores in leaf cells where CO2 enter and O2 exits
Stomata
Stroma
Mesophyll
Chlorophyll
The green pigment in thylakoid membranes of chloroplasts are called
Carotene
Chloroplasts
Mesophyll
Vein
What is the equation for photosynthesis?
CO2 + H20 + Light Energy --> C6H12O6 + O2
6O2 + 6H20 + Light Energy --> C6H12O6 + 6CO2
6CO2 + 6H20 + Light Energy --> C6H12O6 + 6O2
6CO2 + 6H20 + Light Energy --> C6H12O6 + 9O2
What is the Redox reaction of photosynthesis
Water is split
e- transferred with H+ to CO2--->sugar
Water is reduced
Glucose is oxidized
What enabled researchers to track atoms through photosynthesis (van Niel)
Evidence that chloroplasts split water molecules
Evidence that chloroplasts reduced CO2
The plants reflect green light
Plants absorb red, violet, and blue light
Light reactions convert solar energy to chemical energy of ATP and NADPH
True
False
Longer wavelength=higher energy
True
False
(blue-green) light reaction, converts solar
to chemical energy
Chlorophyll A
Chlorophyll B
Carotenoids
Anthocyanin
(yellow-green): conveys E to chlorophyll a
Chlorophyll A
Chlorophyll B
Carotenoids
Anthocyanin
(yellow, orange): photoprotection, broaden
color spectrum for photosynthesis
Chlorophyll A
Chlorophyll B
Carotenoids
Anthocyanin
(red, purple, blue): photoprotection,
antioxidants
Chlorophyll A
Chlorophyll B
Carotenoids
Anthocyanin
What determine the effectiveness of different wavelengths for photosynthesis?
Absorption spectrum
Reflection Spectrum
Refracting prism
Transmittance spectrum
Action Spectrum plots rate
of photosynthesis vs.
wavelength
True
False
Engelmann used bacteria to measure rate of photosynthesis in _____
Algae
Fungi
Animals
Kelp
What wavelengths of light are most effective in driving photosynthesis?
Red
Violet
Blue
Green
Light energy splits H2O to O2 releasing _____
energy ______
High; electrons
High; protons
Low; electrons
Low; protons
The movement of e- is used to generate ATP
True
False
Electrons end up on ________, reducing it to
_______
NADPH; NADP+
NADP+; NADPH
CO2, gluocose
FAD+, FADH2
Electrons in chlorophyll molecules are
excited by reflection of light
True
False
reaction center & light-harvesting
complexes (pigment + protein)
Photosystem
Chlorophyll
Stroma
Photon
What are the two routes for electron flow?
Linear (noncyclic) electron flow
Triangular electron flow
Cyclic electron flow
Cubed electron flow
When the chlorophyll is excited by light absorption, energy is passed to the reaction center of ____________ (protein + chlorophyll a)
Photosystem II
Photosystem I
Primary electron acceptor
Mitochondria
During the linear electron flow, e- are captured by the _____
Stroma
Primary electron acceptor
Dark reactions
Chloroplasts
How are the e- replaced during linear electron flow?
H20 splits---> O2 formed
O2 reduces into H20
NADPH gives off electrons
CO2 is reduced into glucose
After e- move through PSII, they are passed to ____________ via ETC
Photosystem II
Photosystem I
NADPH
H20
Energy transfer pumps H+ to the thylakoid space
True
False
ATP is produced by _______________ and e- moves from PSI's ________________________to 2nd ETC. NADP+ is reduced to NADPH as well.
photophosphorylation; primary electron acceptor
Phosphorylation, reaction center
NADPH, primary electron acceptor
NADP+, reaction center
What is the main idea of the light reactions?
Convert H20 into O2
Use solar energy to generate ATP & NADPH to provide energy for Calvin cycle
Replace lost electrons
Provide food for plants
The cyclic electron flow uses _______ only and produces ONLY _____ for Calvin cycle
Photosystem I; O2
Photosystem I; NADPH
Photosystem I; ATP
Photosystem II; ATP
Both respiration and photosynthesis use ___________to generate ATP
Mitochondria
Intermembrane space
The stroma
Chemiosmosis
Proton motive force generated by:
(1) H+ from water
(2) H+ pumped across by cytochrome
(3) Removal of H+ from stroma when NADP+ is reduced
(4) Addition of H+ from stroma when NADPH is oxidized
What uses ATP and NADPH to convert CO2 to sugar
Light reactions
Calvin Cycle
Krebs Cycle
Photosystems
The Calvin cycle occurs in the _______, produces ATP, NADPH, _____, and 3-C sugar _____
Stroma, CO2, G3P
Thylakoids, O2, G3P
Stroma, CO2, 3GP
Thylakoids, CO2, RuBP
What are the three phases of the Calvin cycle?
Carbon fixation
Reduction
Regeneration of RuBP (CO2 acceptor)
Oxidation
In phase 1 of the Calvin Cycle, 3 CO2 are added to RuBP and catalzyed by the enzyme ________
Lactase
Rubisco
PEP carboxylase
Maltase
Phase 2 of the Calvin Cycle uses 6 ATP and 6 NADPH to produce 1 net ___
G3P
Rubisco
RuBP
Pi
Phase 3 of the Calvin Cycle uses 3 ATP to regenerate _____
Rubisco
G3P
RuBP
CO2
Photorespiration is a metabolic pathway which uses O2 & produces CO2, uses ATP, and there's no sugar production (rubisco binds O2---> breakdown of RuBP
True
False
Photorespiration occurs on cold, dry dark days when stomata close (conserve H2O)
True
False
In C3 plants, CO2 is fixed to a ____ compound in the Calvin Cycle (Ex. Rice, wheat, soybeans)
2-C
3-C
4-C
5-C
In C4 plants, CO2 is fixed to a ___ compound (Ex. corn, sugarcane, grass)
2-C
3-C
4-C
5-C
What are the two cell types of C4 plants?
Vein
Mesophyll
Bundle Sheath
Chlorophyll
PEP carboxylase fixes CO2 (4-C), pump CO2 to bundle sheath
Mesophyll
Bundle Sheath
CO2 used in Calvin Cycle
Mesophyll
Bundle Sheath
Which type of plants open their stomata at night-->CO2 enters---> converts to organic acid, which is stored in mesophyll cells and in the day, their stomata is closed--> light reactions supply ATP, NADPH; CO2 released from organic acids for Calvin Cycle (Ex, cacti, pineapples)
C3
C4
CAM
Which type of plant perform C fixation & Calvin together?
C3
C4
CAM
Which type of plant performs C fixation & Calvin
in different cells?
C3
C4
CAM
Which type of plant performs C fixation & Calvin
at different TIMES?
C3
C4
CAM
What embedded protein complex found in the thylakoids membrane uses excited e- to reduce NADP+ into NADPH
Photosystem I
Photosystem II
ATP Synthase
What embedded protein complex found in the thylakoid membrane provides excited e- to the ETC
Photosystem I
Photosystem II
ATP synthase
What embedded protein complex found the the thylakoid membrane converts ADP to ATP using free energy from a flow of H+?
Photosystem I
Photosystem II
ATP Synthase
What is the source of replacement electrons for those released from Photosystem II
From split H2O
From e- that completed the ETC
From CO2
From NADPH
What is the source of replacement electrons for those released from photosystem two
From split H2O
From e- that completed the ETC
From CO2
From NADPH
Carbon dioxide is involved in the light-dependent reaction
True
False
Where do the ATP and NADPH produced during the light dependent reactions go when the process is complete?
Granum
Calvin Cycle
PS I
Home
Each RuBP molecule contains 5 carbon atoms. How many RuBP molecules are used in one turn of the Calvin Cycle?
3
6
4
2
How many CO2 molecules are used in one turn of the Calvin cycle?
1
2
3
4
How many PGA molecules are made in one turn of the Calvin cycle?
3
4
5
6
What happened to the carbon Adams from the carbon dioxide molecules that entered the Calvin cycle?
Oxidized
Incorporated into PGA molecules
Nothing
combined with H2O
PGA molecules are reduced into PGAL by losing and oxygen. What types and how many molecules provide the free energy necessary for the reduction of the PGA molecules?
6 ATP
3 NADPH
6 NADPH
3 ATP
How many Water molecules are produced of the reduction phase of the Calvin cycle
4
5
6
7
How many PGAL molecules continue onto the reduction phase of the Calvin cycle?
4
5
6
7
What molecule is regenerated during the regeneration phase of the Calvin cycle?
Rubisco
CO2
RuBP
G3P
What happens to the PGAL/G3P molecule that does not continue on in the Calvin cycle?
It oxidizes back into PGA
Used by the cell to make glucose
Goes to the light reaction
Nothing
How many G3P molecules will it take to make one molecule of glucose?
1
2
3
4
How many turns of the Calvin cycle will it take to make one molecule of glucose
1
2
3
4
Order these words chronologically in the order in which the energy flow occurs:
electrons Glucose ATP Sunlight
Sunlight—>e- —> ATP—> Glucose
Sunlight—>ATP—> e- —> Glucose
e- —>sunlight —> ATP—> Glucose
Sunlight—>e- —> Glucose—> ATP
