Photosynthesis

Name the two reactants in photosynthesis.
Carbon dioxide and water
1 of 35
Name the plant organs in which most photosynthesis occurs.
Leaves
2 of 35
Name the plant cell organelle in which photosynthesis occurs.
Chloroplast
3 of 35
What is the source of the energy required for photosynthesis to occur?
Light energy from the Sun
4 of 35
Describe why plants carry out photosynthesis.
To provide themselves with energy
5 of 35
Explain why there would be almost no life on Earth without plants.
Almost all animals eat them or eat other animals that have eaten them
6 of 35
Give the word equation for photosynthesis.
Carbon dioxide and water [and light]  glucose and oxygen
7 of 35
Name the green chemical that must be present for photosynthesis to ace
Chlorophyll
8 of 35
Name the plant tissue in which most photosynthesis occurs.
Palisade mesophyll
9 of 35
Name the plant tissue with the highest concentration of chloroplasts.
Palisade mesophyll
10 of 35
Name the type of specialised cell in a plant that absorbs the most water.
Root hair cell
11 of 35
Other than plants, name another type of organism that photosynthesises.
Algae
12 of 35
Give the chemical formula for glucose.
C6H12O6
13 of 35
Define the term 'limiting factor'.
Anything that reduces or stops the rate of a reaction
14 of 35
Name the process by which plants absorb mineral ions from the soil.
Active transport
15 of 35
Name the key metal element in making chlorophyll.
Magnesium
16 of 35
Describe the leaves of a plant with a magnesium deficiency.
Often they are yellow rather than green.
17 of 35
Explain why farmers often grow crops in polytunnels and greenhouses.
The crops are more protected from the wind and pests in polytunnels and greenhouses, but this also allows farmers to control the temperature, carbon dioxide and light needed for maximum photosynthesis.
18 of 35
Give the five uses of glucose formed during photosynthesis.
It is used in respiration, converted into insoluble starch and stored, converted into fats and oils and stored, used to make cellulose cells walls for growth, and, along with nitrate ions absorbed from the soil, makes proteins.
19 of 35
Name the compound produced by plants to strengthen their cell walls.
Cellulose
20 of 35
What proportion of energy moves through each stage of a food chain?
10%
21 of 35
Explain why photosynthesis is an endothermic reaction.
Because it requires light energy to work
22 of 35
Explain why the rest of the plant, and not just the leaves, requires the gluco made during photosynthesis.
So that the cells can respire to release energy
23 of 35
Other than green, give the other two colours of photosynthetic pigment present in plants and algae.
Brown and red
24 of 35
Give the balanced symbol equation for photosynthesis.
6CO2 + 6H2O [+ light]  C6H12O6 + 6O2
25 of 35
Name the four limiting factors in photosynthesis.
Temperature, carbon dioxide, light, chlorophyll
26 of 35
Explain why less photosynthesis occurs at lower temperatures .
Because the reactant molecules have less kinetic energy, so collide less, and so react less
27 of 35
Explain why more photosynthesis occurs with more carbon dioxide.
Because it is one of the two key reactants
28 of 35
Explain why less photosynthesis occurs under lower light conditions.
Because light provides the energy necessary for this reaction, so reduced levels mean reduced photosynthesis
29 of 35
Describe an experiment in which you investigate the effect of light intensity photosynthesis.
Put a small length of pondweed into a boiling tube of water and position a short distance from a lamp. After 2 minutes, record the number of bubbles of oxygen produced. Move the tube progressively further away from the lamp and repeat.
30 of 35
Define the term 'yield'.
The amount of an agricultural product
31 of 35
Describe what farmers can do to greenhouses or polytunnels in which they growing plants to improve their yield.
Keep the temperature at an optimum, have burners near their plants to produce carbon dioxide for optimal growth and provide their plants with maximum light
32 of 35
Where is the energy that is taken in by photosynthesis stored after the reaction
In the chemical bonds of the glucose molecules
33 of 35
Explain how we know there more energy in glucose and oxygen combinedin carbon dioxide and water combined.
Because the plant has used light energy to make glucose
34 of 35
Name the type of ions absorbed by roots which are used by plants to make protein
Nitrate ions
35 of 35

Other cards in this set

Card 2

Front

Name the plant organs in which most photosynthesis occurs.

Back

Leaves

Card 3

Front

Name the plant cell organelle in which photosynthesis occurs.

Back

Preview of the front of card 3

Card 4

Front

What is the source of the energy required for photosynthesis to occur?

Back

Preview of the front of card 4

Card 5

Front

Describe why plants carry out photosynthesis.

Back

Preview of the front of card 5
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