Unit 3 Key area 1 Flashcards
Yellow pigments which absorb light and pass the energy to chlorophyll
Carotenoids
Ability to access food of adequate quantity and quality
Food security
Variety of plant obtained form natural species by selection and/or genetic manipulation and maintained by cultivation
Cultivar
Techniques used to separate the components of a mixture that differ int heir degree of solubility in a solvent
Chromatography
Process by which green plants trap light energy and use it to produce carbohydrates
Photosynthesis
Process by which light is taken in and retained by plants
Absorption
Process by which light bounces off a leaf surface
Reflection
Graph showing the rate of photosynthesis by a green plant at different wavelengths of light
Action Spectrum
Display/graph showing the quantity of light absorbed by a pigment at different wavelengths of light
Absorption spectrum
Term referring to a level in a food chain or pyramid
Trophic
Green pigments which absorb light in the red and blue regions of the spectrum
Chlorophylls
Large group of organic compounds that contain carbon, hydrogen and oxygen
Carbohydrates
One thousand-millionth of a metre
Nanometre
Metabolite in the Calvin Cycle which acts as the carbon dioxide acceptor
RuBP
Breakdown of water during the light-dependent stage of photosynthesis
Photolysis
Raw material which becomes split into oxygen and hydrogen during photolysis
Water
Compound which accepts hydrogen released during the photolysis of water
NADP
Second stage of photosynthesis during which carbon dioxide is taken up and sugar is synthesised
Calvin cycle
Enzyme which catalyses the synthesis of ATP form ADP and Pi
ATP synthase
Enzymes which fixes carbon dioxide by attaching it to RuBP
Rubisco
High energy compound which provides the energy needed to drive the Calvin cycle
ATP
Product of photolysis of water which becomes attached to NADP
Hydrogen
Product of photolysis of water which is required for aerobic respiration
Oxygen
First stage of phtotsynthesis during which light energy is converted to chemical energy
Light dependent reaction
Metabolite in the Calvin cycle used to regenerate RuBP and make sugar
G3P
Raw material which supplies carbon atoms to be fixed into carbohydrates
Carbon dioxide
Group of protein molecules in the membrane of a chloroplast which makes energy available to pump H+ across the membrane and to split water molecules
Electron transport chain
Process by which light passes though a leaf
Transmission
