Photosynthesis Flashcards
Write a balanced equation to summarise the process of photosynthesis
6CO2+6H2O—(light and chlorophyl)–> C6H12O6+6O2
Name the energy source for photosynthesis
sun
In what main part of a plant does most photosynthesis take place
Chloroplast
Name structures in plant cells in which photosynthesis takes place
Chlorophyll
What is the role of chlorophyl?
Absorb light needed for photosynthesis
Name gas used and produced by photosynthesis
Used: CO2
Produced: O2
Carbon dioxide is essential for photosynthesis. Where does it enter the leaf?
Stomata
From your knowledge of photosynthesis suggest a way to increase the yield of plants such as lettuces in a greenhouse?
Add more CO2 as it increases the level of photosynthesis
State a precise role for each of the following in photosynthesis
(i) Carbon dioxide
(ii) Water
(i) supplies Carbon to form glucose
(ii) photolysis of water supplies hydrogen and electrons for glucose formation
Suggest a way in which the rate of photosynthesis of plants in a greenhouse could be increased
adding more light/temperature to increase the rate of reaction
What is the relationship between the rate of photosynthesis and either the light intensity and carbon dioxide concentration
Light intensity: provides energy
Carbon dioxide: supplies carbon for glucose formation
The cells in the palisade layer contain many organelles that carry out photosynthesis. Suggest why the cells here obtain more if these that organelles than the cells in the spongy mesohpyl
They are closer to the upper epidermis meaning they have more light
What plant did you use for the photosynthesis experiment?
elodea
During the first stage of photosynthesis energised electrons enter two pathways. where do the energised electrons come from?
Chlorophyl
Give the alternative name for the first stage of photosynthesis
light stage
Two products of the light stage of photosynthesis are vital for the dark stage. Name these products
ATP, NADPH
In the second stage of photosynthesis compounds of the general formula Cx(H2O)y are formed. what name is given to this group of compounds?
Carbohydrates
Light energy trapped by chlorophyl is used to split water. List 3 products that result when water is split
- O2
- Protons
- Electrons