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31 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Photosynthesis |
The process by which green plants manufacture food |
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What is the equation for photosynthesis |
6H20 + 6CO2= C6H12O6 + 6O2 |
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Where does The light dependent stage of photosynthesis occur |
Thylakoid |
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Where does the light independent stage of photosynthesis occur? |
In the stroma |
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Give five adoptations of the leaf for light absorption |
- plants exhibit phototropism -leave have a large surface area -the palisade mesophyll are packed with chloroplast -leaves have a transparent cuticle |
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Give four adoptations of the leaf for obtaining and removing gases |
-leave are thin and facilitate fast diffusion - the presence of many stomata -spongy mesophyll has many air spaces which facilitates gaseous exchange |
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What is energy transduction |
Changing energy from one form to another |
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What is another name for the light independent stage |
Calvin cycle |
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What are photo systems made from |
Several hundred chlorophyll molecules plus accessory pigments |
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What is The main photosynthetic pigment |
Chlorophyll A |
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Define the term pigments |
Molecules that absorb a particular wave length of light |
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Why do plants appear green |
Because the major photosynthetic pigment, chlorophyll A, absorb light in the violet, blue and red regions while reflecting green, hence, plants appear green |
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What colour Does carotenoids absorb |
Violet blue and green and reflect yellow / orange |
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What happens in the light dependent stage of photosynthesis |
Chlorophyll converts light energy into chemical energy( ATP / NADPH) |
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What is phospherelation |
The addition of a phosphate group to a molecule |
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Give a detailed over view of the light dependent stage of photosynthesis |
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What type of phosphorelation occurs in the light dependent stage |
Non cyclic |
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What are the products of the light reaction |
NADPH and ATP |
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What are the products of cyclic phospho |
ATP ONLY |
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Why is it called cyclic |
Because the electrons are returned to the initial chlorophyll A molecule |
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In the Calvin cycle NADPH acts as a: |
Reducing agent |
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What are the three essential stages of the Calvin cycle |
- CO2 fixation: co2 combines with RuBp to form and unstable six carbon compound which breaks down to form two Glycerate 3 phosphate molecules this is catalysed by rubisco -the reduction stage: glycerate 3 phosphate is reduced to trios phosphate. -Regeneration of rubp : this is regenerated from glyceraldehyle 3 phosphate and requires energy in the form of ATP |
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What is a limiting factor |
A factor in a reaction which is closest to its minimun |
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What four factors affect the rate of photosynthesis |
Carbon dioxide Water Light intensity Temperature |
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What is the level of Co2 required for efficient photosynthesis |
0.1% |
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How does inorganic ions affect photosynthesis |
They are key components of chlorophyll and therefore lacking them would affect chlorophyll formation and the Rate of photosynthesis |
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What is Cholosis |
Yellowing of plant leaves due to a reduction in the amount of chlorophyll present |
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Limiting factors and productivity |
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What is ATP made from |
A sugar called ribose, a nitrogenous base called adenine and 3 phosphate groups |
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What is glycolysis |
The oxidation of glucose to pyruvate |
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What are the three main stages of cellular respiration |
-Glycolysis -Krebs Cycle -oxidative phosphorelation |
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