Photosynthesis Key Words

Some essential key words from the photosynthesis topic and their definitions

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  • Created by: Katherine
  • Created on: 17-12-12 17:45
Algal blooms
Increased growth of algae due to increased minerals
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Autotrophs
Organisms able to use inorganic molecules to make organic molecules
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Biodiversity
The variety of living organisms in a particular area
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Calvin Cycle
Alternative name for the light independent stage of photosynthesis
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Chlorophyll
A light sensitive pigment found at the centre of a photosystem in the thylakoid membrane of the chloroplast
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Chloroplast
The organelle in which photosynthesis takes place
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Climax community
The final community achieved at the end of succession
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Community
All the different species occupying a habitat at any one time
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Ecosystem
An ecological unit that includes all the living (biotic) and non-living (abiotic) features of the environment
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Energy transfer efficiency
A measure of the amount of energy transferred from one trophic level to another in a food chain
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Eutrophication
Increased introduction of minerals, often to waterways, causing an increased growth of algae and further effects
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Extensive farming
Producing crops and livestock on large areas of land with little or no added fertiliser
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Glycerate 3-phosphate
The three carbon molecule formed in the Calvin cycle from the splitting of the unstable 6 carbon molecule from RuBP and carbon dioxide
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Habitat
The place where an organism lives
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Heterotrophs
Organisms which take in organic molecules through feeding
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Intensive farming
Producing large amounts of food in relatively small areas of land
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Light dependent stage
The first stage of photosynthesis, which takes place in the thylakoid membranes of the chloroplast in the presence of light
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Light independent stage
The second stage of photosynthesis, which takes place in the stroma of the chloroplast and does not require the presence of light
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NADP
A coenzyme which is reduced to NADPH during the light dependent reaction and used in the light independent reaction
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Nitrobacter, Nitrosomonas and Rhizobium
The three microorganisms involved in the nitrogen cycle
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Organic molecule
Any molecule that is constructed about a central carbon backbone
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Palisade layer
The layer within green plants where the photosynthetic cells are found
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Plagioclimax
A community in which succession has been deflected, so it does not achieve its climatic climax
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Photosynthesis
The process by which organic molecules are synthesised using the energy from light
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Photosystems
Groups of light sensitive pigments which harvest the energy from light
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Primary consumer
Organisms which feed on producers
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Ribulose bisphosphate
The five carbon sugar which is recycled during the light independent stage of photosynthesis. Abbreviated to RuBP
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Rubisco
The enzyme ribulose bisphosphate carboxylase which combine carbon dioxide with RuBP
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Secondary consumers
Organisms which feed on primary consumers
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Species
A group of organisms that are alike in biochemistry, physiology and appearance, and are capable of interbreeding to produce fertile offspring
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Species richness
A calculated indication of the biodiversity in a particular area. A high value indicates a rich and diverse community
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Succession
The process where different species or organisms that are found in a community change over time
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Sustainable farming
Successfully producing food over a long period of time with little or no negative effect on the natural environment
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Thylakoid membrane
The network of membranes found inside the chloroplast stacked in layers known as grana. The site of light dependent reactions
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Triose phosphate
The three carbon sugar in the calvin cycle from which RuBP is regenerated
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Trophic level
The level within a food chain at which an organism exists
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Card 2

Front

Organisms able to use inorganic molecules to make organic molecules

Back

Autotrophs

Card 3

Front

The variety of living organisms in a particular area

Back

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Card 4

Front

Alternative name for the light independent stage of photosynthesis

Back

Preview of the back of card 4

Card 5

Front

A light sensitive pigment found at the centre of a photosystem in the thylakoid membrane of the chloroplast

Back

Preview of the back of card 5
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