2297318
Description
Flashcards by Logan Scott, updated more than 1 year ago
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Created by Logan Scott
about 9 years ago
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| Question | Answer |
| Word Equation for Photosynthesis | Carbon Dioxide + Water = (in presence of Light & Chlorophyll) Oxygen + Glucose |
| Symbol Equation for Photosynthesis | CO2 + H20 = O2 + C6H12O6 |
| Balanced Symbol Equation for Photosynthesis | 6CO2 + 6H20 = 6O2 + C6H12O6 |
| Definition of Photosynthesis | The conversion of Water & Carbon Dioxide to Glucose and Oxygen, in the presence of Light and Chlorophyll |
| What is the role of Chlorophyll? | to absorb light energy |
| If there is insufficient amounts of ______ or _______, photosynthesis will not occur at optimum rate. | Light, Carbon Dioxide |
| As Photosynthesis is enzyme-driven, _______ temperature will affect it. | Temperature |
| When the graph plateaus out, what other factors could be limiting photosynthesis? | Carbon Dioxide Levels, Temperature |
| What is a limiting factor? | the component of the reaction in shortest supply, preventing the rate of photosynthesis from increasing. |
| What is the most common factor for limiting photosynthesis? | Carbon Dioxide Levels in the Air |
| How 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 |
| Which mineral ion deficiency causes the leaves to turn yellow? | Magnesium |
| What are nitrates used for in plants? | Creating amino acids (proteins) |
| What is the symbol for magnesium ions? | Mg 2+ |
| What is the symbol for nitrate ions? | NO3 - |
| Which mineral ion deficiency causes the plants growth to be stunted? | Nitrates |
| Name 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. |
| What adaptation does the upper epidermis have to increase photosynthesis? | It is transparent |
| What part of the leaf prevents water loss and entry of pathogens? | Waxy Cuticle |
| Where is the main site of photsynthesis? | Palisade Mesophyll |
| What is the role of the stomata? | To allow carbon dioxide to diffuse into the leaf, and oxygen to leave it. |
| 1. Waxy Cuticle 2. Upper Epidermis 3. Palisade Mesophyll 4. Lower Epidermis 5. Vein/Xylem/Phloem 6. Spongy Mesophyll 7. Stomata | |
| What surrounds to stomata, and can close to stop gases from entering and exiting the leaf? | Guard Cells |
| What does the Phloem do? | Transports the sugars produced by photosynthesis away from the leaf. |
| What does the Xylem do? | Supplies water to the leaf for photosynthesis. |
| Why can a fresh leaf not be tested for starch using iodine solution? | The green of the leaf would hide any colour change. |
| What 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 |
| What colour will iodine solution turn to indicate the presence of starch? | Blue/Black |
| How 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. |
| How might we investigate the effect of light intensity on photosynthesis? | Carry out the experiment with Elodea Pondweed. |
| What 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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