BIOL 1001 (LSU) - CW (Ch. 7)
Questions And Answers.
Chlorophyll A - Answer The most abundant type of chlorophyll molecule in photosynthetic
eukaryotic organisms and in cyanobacteria.
Pigment molecule - Answer A light-absorbing, colored molecule, such as chlorophyll,
carotenoid, or melanin molecules.
Electromagnetic spectrum - Answer The range of all possible wavelengths of electromagnetic
radiation, from wavelengths longer than radio waves to microwaves, infrared visible light,
ultraviolet, x-rays, and gamma rays.
C3 plant - Answer A plant that relies on the C3 pathway to fix carbon.
Accessory pigment - Answer A colored molecule other than chlorophyll A, that absorbs light
energy and passes it to chlorophyll A.
ATP synthase - Answer A channel protein in the thylakoid membranes of chloroplasts and the
inner membrane of mitochondria that uses the energy of H+ ions moving through the channel
down their concentration gradient to produce ATP from ADP and inorganic phosphate.
Cuticle - Answer A waxy or fatty coating on the surfaces of above ground epidermal cells of
many land plants; aids in the retention of water.
Chemiosmosis - Answer A process of ATP generation in chloroplasts and mitochondria.
Photorespiration - Answer A series of reactions in plants in which O2 replaces CO2 during
the Calvin cycle, preventing carbon fixation; this wasteful process dominates when C3 plants are
forced to close their stomata to prevent water loss.
Epidermis - Answer In plants, the outer most layer of cells of a leaf, young root, or young
stem.
Photosystem - Answer In thylakoid membranes, a cluster of chlorophyll, accessory pigment
molecules, proteins, and other molecules that collectively capture light energy, transfer some of
the energy to electrons, and transfer the energetic electrons to an adjacent electron transport
chain.
Questions And Answers.
Chlorophyll A - Answer The most abundant type of chlorophyll molecule in photosynthetic
eukaryotic organisms and in cyanobacteria.
Pigment molecule - Answer A light-absorbing, colored molecule, such as chlorophyll,
carotenoid, or melanin molecules.
Electromagnetic spectrum - Answer The range of all possible wavelengths of electromagnetic
radiation, from wavelengths longer than radio waves to microwaves, infrared visible light,
ultraviolet, x-rays, and gamma rays.
C3 plant - Answer A plant that relies on the C3 pathway to fix carbon.
Accessory pigment - Answer A colored molecule other than chlorophyll A, that absorbs light
energy and passes it to chlorophyll A.
ATP synthase - Answer A channel protein in the thylakoid membranes of chloroplasts and the
inner membrane of mitochondria that uses the energy of H+ ions moving through the channel
down their concentration gradient to produce ATP from ADP and inorganic phosphate.
Cuticle - Answer A waxy or fatty coating on the surfaces of above ground epidermal cells of
many land plants; aids in the retention of water.
Chemiosmosis - Answer A process of ATP generation in chloroplasts and mitochondria.
Photorespiration - Answer A series of reactions in plants in which O2 replaces CO2 during
the Calvin cycle, preventing carbon fixation; this wasteful process dominates when C3 plants are
forced to close their stomata to prevent water loss.
Epidermis - Answer In plants, the outer most layer of cells of a leaf, young root, or young
stem.
Photosystem - Answer In thylakoid membranes, a cluster of chlorophyll, accessory pigment
molecules, proteins, and other molecules that collectively capture light energy, transfer some of
the energy to electrons, and transfer the energetic electrons to an adjacent electron transport
chain.
