Fichas
Photosynthesis
Fichas del conjunto (31)
- 1Word Equation for PhotosynthesisCarbon Dioxide + Water = (in presence of Light & Chlorophyll) Oxygen + Glucose
- 2Symbol Equation for PhotosynthesisCO2 + H20 = O2 + C6H12O6
- 3Balanced Symbol Equation for Photosynthesis6CO2 + 6H20 = 6O2 + C6H12O6
- 4Definition of PhotosynthesisThe conversion of Water & Carbon Dioxide to Glucose and Oxygen, in the presence of Light and Chlorophyll
- 5What is the role of Chlorophyll?to absorb light energy
- 6If there is insufficient amounts of ______ or _______, photosynthesis will not occur at optimum rate.Light, Carbon Dioxide
- 7As Photosynthesis is enzyme-driven, _______ temperature will affect it.Temperature
- 8When the graph plateaus out, what other factors could be limiting photosynthesis?Carbon Dioxide Levels, Temperature
- 9What is a limiting factor?the component of the reaction in shortest supply, preventing the rate of photosynthesis from increasing.
- 10What is the most common factor for limiting photosynthesis?Carbon Dioxide Levels in the Air
- 11How could a farmer use limiting factors of photosynthesis to his advantage?Burn paraffin in the greenhouse to increase carbon dioxide levels and temperature,
Increase the light concentration in his greenhouse - 12Which mineral ion deficiency causes the leaves to turn yellow?Magnesium
- 13What are nitrates used for in plants?Creating amino acids
(proteins) - 14What is the symbol for magnesium ions?Mg 2+
- 15What is the symbol for nitrate ions?NO3 -
- 16Which mineral ion deficiency causes the plants growth to be stunted?Nitrates
- 17Name three external adaptations of a leaf and explain why they are effective.Large surface area- absorbs more sunlight.
Chlorophyll- absorbs sunlight
Supported by a stalk- allows for angling towards the sun. - 18What adaptation does the upper epidermis have to increase photosynthesis?It is transparent
- 19What part of the leaf prevents water loss and entry of pathogens?Waxy Cuticle
- 20Where is the main site of photsynthesis?Palisade Mesophyll
- 21What is the role of the stomata?To allow carbon dioxide to diffuse into the leaf, and oxygen to leave it.
- 22—1. Waxy Cuticle
2. Upper Epidermis
3. Palisade Mesophyll
4. Lower Epidermis
5. Vein/Xylem/Phloem
6. Spongy Mesophyll
7. Stomata
- 23What surrounds to stomata, and can close to stop gases from entering and exiting the leaf?Guard Cells
- 24What does the Phloem do?Transports the sugars produced by photosynthesis away from the leaf.
- 25What does the Xylem do?Supplies water to the leaf for photosynthesis.
- 26Why can a fresh leaf not be tested for starch using iodine solution?The green of the leaf would hide any colour change.
- 27What must be done to allow for testing with iodine solution?1. Place plant in darkness for 24hrs, to remove starch in the plant.
2. Place plant in bright light for 12hrs.
3. remove a leaf and immerse in boiling water for at least 1min, denaturing the enzymes.
5. Boil the leaf in ethanol for 5mins, to remove the chloropyll.
6. Rinse the leaf - 28What colour will iodine solution turn to indicate the presence of starch?Blue/Black
- 29How can we prove that chlorophyll is needed for photosynthesis with an experiment? What would you expect to see.Carry out the iodine test with a variegated leaf. The white areas will not turn a blue/black colour with the iodine.
- 30How might we investigate the effect of light intensity on photosynthesis?Carry out the experiment with Elodea Pondweed.
- 31What is the Elodea Pondweed experiment?Count the number of bubbles coming off of the Elodea Pondweed for one minute, then change the distance between the light and the beaker and repeat.
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- Descripción
- GCSE Biology Fichas sobre Photosynthesis, creado por Logan Scott el 17/03/2015.
- Creado por
- Logan Scott
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