Photosynthesis Flashcards
1
Q
What are the factors that affect Photosynthesis?
A
- Light intensity
- Carnon dioxide concentration
- Temperature
2
Q
What is thw word equation for photosynthesis?
A
Carbon Dioxide + Water—(light + Chlorophyll)–> Glucose + Oxygen + Water
3
Q
How do we test for the occurence of photosynthesis in plants?
A
- Boil the leaf in alcohol to remove the chlorophyll and make it white
- Do iodine test for starch (starch present = Photosynthesis present)
- If the leaf turns blue-black, then starch is present but, if the leaf turns brown then starch is absent.
4
Q
How to test for the affect of light intesnity on photosynthesis?
A
- Use a ruler to measure the distance between the lamp and the set-up, and compare the distnace with the number of oxygen bubbles produced by the water plant in the set up.
- Closer distnace = Higher light intensity = More oxygen bubbles
- Futher distmace = Lower light intensity = Less oxygen bubbles
5
Q
How to prove whether chlorophyll is needed for photosynthesis to occur?
A
- use a a variegated leaf as the green parts contain chlorophyll but the white parts do not.
- Do iodine test on the leaf, and the green parts will turn black-blue but the white parts of the leaf will reamin brown.
6
Q
Where does most of the photosynthesis occur in the leaf?
A
Palisade mesophyll cells (third layer in th leaf)
7
Q
What is the relationship between temperature and rate of photosynthesis?
A
- As the temperature increases, the rate of photosynthesis increases up til’ optimum temperature of the enzymes involved in photosynthesis is reached.
- Once the temperature increases beyond the optimum temperature, the rate of photosynthesis decreases as the enzymes have denatured.
8
Q
What is the r/s between the crabon dioxide concentration and photosynthesis?
A
As carbon dioxide concentration increases, the rate of photosynthesis increases up til’ a certain point where it will reamin constant.
