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WorksheetsBIO CO5 PHOTOSYNTHESIS
Total questions: 51
Worksheet time: 38mins
ability to promote change or do work
energy
metabolism
anabolism
two types of energy
chemical energy
kinetic energy
solar energy
is stored in the bonds between atoms and molecules
(a)
is the break down of large molecules into smaller units; exergonic
(a)
the synthesis of large molecules from smaller units; endergonic
catabolism
metabolism
anabolism
energy that is harvested from the sun
(a)
is the sum of all chemical reactions within a cell or an organism
(a)
the following describes Adenosine Triphosphate…
primary energy “currency” in biological systems
highly exergonic
energy-intermeediate molecule
used to drive cellular processes
when ATP undergoes (a) , water breaks the phosphoanhydride bond that links the phosphate to the second
adenosine diphosphate and inorganic phosphate are formed from what process?
(a)
the reverse reaction, whereby ATP is synthesized from ADP and Pi with a loss of a water molecule by _______, is correspondingly endergonic
evaporation
condensation
dehydration
suppression
involve reactions that obtain energy mainly from sunlight
phototrophic energy metabolism
chemotrophic energy metabolism
oxidation
chemotrophic energy metabolism
energy-yielding oxidative-reductive reactions
loss of electrons
reduction is the gain of electrons
gains electron and becomes reduced
Oxidation:
Mg ————> Mg2+ + 2e
True
False
NADH ——> NAD+
true
false
is the loss of electrons, loss of hydrogen atoms, or gain of oxygen
(a)
Nicotinamide Adenine Dinucleotide reduced
(a)
NAD meaning
(a)
is the gain of electrons, gain of hydrogen atoms, or loss of oxygen atoms
reduction
condensation
oxidation
gains electron and becomes reduced
oxidizing agent
reducing agent
loses electron and becomes oxidized
oxidizing agent
reducing agent
oxidation cannot occur without reduction, and vice versa
true
false
conversion of light energy to chemical energy and its subsequent use in synthesizing organic molecules
(a)
uses light as energy source and organic compounds as carbon source
photohetetotrophs
photoautotrophs
uses light as energy source and inorganic compounds as carbon source
photoheterotrophs
photoautotrophs
chloroplasts are found mainly in the _____
stomata
thylakoids
mesophyll cell
grana
carbon dioxide enters the leaf and oxygen exits by way of microscopic pores called (a)
site of photosynthesis in plants
(a)
two stage of photosynthesis
light-dependent reaction
calvin-benson cycle
dark reaction
conversion of light energy to chemical energy and its subsequent use in synthesizing organic molecules
(a)
the following describes Light-dependent reactions:
occur in thylakoids
carbon fixation
conversion of light energy to chemical energy (ATP and NADPH)
source of hydrogen ions (H+)
the following describes Calvin Cycle:
conversion of light energy
carbon fixation
reduction of fixed carbon to carbohydrates
requires ATP and NADPH from light-dependent reactions
green pigment (light-absorbing molecules)
found in thylakoid membranes of chloroplast
gives leaves their green color
grana
chlorophyll
thylakoid membranes
Chlorophylls appear green because they reflect and transmit the wavelengths of yellow and green light
true
false
(a) absorb red and violet-blue wavelengths which provide the energy used in photosynthesis
main photosynthetic pigment
cholophyll a
chlorophyll b
accessory pigment
chlorophyll a
chlorophyll b
chlorophyll molecules, accessory pigments, and associated proteins are organized into functional units called (a) which are localized into the thylakoid membranes
energy from photons are transferred to electrons — ground state to excited state
(a)
when excited electrons go back to the ground state (in photoexcitation), photons are given off
true
false
occurs in the stroma
(a)
calvin cycle phases
carbon fixation
oxidation
reduction
regeneration of RuBP
On hot, dry days, plants close their chlorophyl to conserve water but this limits photosynthesis
true
false
closing the stomata reduced the plant’s access to carbon dioxide and causes oxygen gas to build up
true
false
these conditions favor an apparently wasteful process known as
(a)
in photorespiration, (a) adds O2 instead of CO2 in the calvin cycle, producing a two-carbon compounds
minimize the cost of photorespiration by incorporating CO2 into four-carbon compounds in mesophyll cells
C4 plants
C3 plants
H2O
C4 pathway requires the enzyme
(a)
some plants including succelents, use (a) (CAM) to fix carbon
CAM plants open their stomata at night incorporating CO2 into organic acids
true
false
stomata close during the day, and Co2 is released from organic acids and used in the calvin cycle
false
true
