Question On Photosynthesis.....?

Question

How can we test and confirm the biological conditions that are necessary for photosynthesis to occur.....State Sources if any..

Answer 1

http://www.uq.edu.au/_School_Science_Lessons/UNBiologyTable.html#3.34.0H

Vist the above site.

On that page, you will find a list of various tests, with links beside each item.

Check out the links for these particular lab tests for specific biological conditions necessary for photosynthesis to occur.

3.34.0 Photosynthesis
3.34.0 Light is necessary for photosynthesis
3.34.1 Carbon dioxide is necessary for photosynthesis
3.34.2 Plants growing in the dark
3.34.3 Plants need salts, hydroponics, Knop's solution
3.34.4 Chlorophyll is necessary for photosynthesis, variegated leaf
3.34.5 Separate chlorophyll pigments with paper chromatography
3.34.6 Fluorescence of chlorophyll
3.34.7 Waterweed in the light and in the dark
3.34.8 Bromothymol blue test for carbon dioxide
3.34.9 Limewater test for carbon dioxide
6.5.2 Plants need water, daisy, potted plant
6.5.3 Plants need salts, maize plants
6.5.4 Chloroplasts
6.5.5 Chlorophyll is necessary for photosynthesis, variegated leaf
6.5.6 Chloroplasts in cells of water-weeds and algae
6.5.7 Extract chlorophyll from green leaves, potato, onion, Tropaeolum, Fuchsia, hyacinth, lilac
6.5.9 Fluorescence of chlorophyll
6.5.12 Test for sugars
6.5.13 Bromothymol blue test for carbon dioxide
6.5.14 Release of oxygen during photosynthesis
6.5.15 Measure the rate of photosynthesis, Elodea
6.5.16 Measure the effects of factors on photosynthesis
6.5.17 Plants growing in the dark
6.5.18 Plants need salts, hydroponics, Knop's solution

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Represent photosynthesis by the word equation:
carbon dioxide + water ---------> glucose + oxygen

Investigate the conditions necessary for photosynthesis:

light intensity
temperature
carbon dioxide (Elodea experiments)

Recall that chlorophyll absorbs light energy

Explain the stages in testing a leaf for starch to include:

boiling to stop further photosynthesis
decolourising in ethanol
softening with water
staining with iodine

Outline the use of the products of photosynthesis to include:

glucose for respiration
starch for storage
cellulose for cell wall

Understand that sugars made during photosynthesis are transported in the phloem from the leaves to the fruits and other storage organs

Explain the interdependence of plants and animals in relation to oxygen and carbon dioxide

Explain the effect of limiting factors on the rate of photosynthesis to include:

light intensity
temperature
carbon dioxide concentration

Answer 2

0) for the absence of soil and water=
grow a plant in soiled pot and other in non soil pot
feed one soiled plant with water and other with no water.
1) for requirement of light=
keep the plant in phases of dark and light and see for the growth of the plant.
2) for the specific wavelength of light=
keep an acquatic plant in WILMOTT'S BUBBLER and wrap it with a] green gelatin b] yellow gelatin and c] red gelatin and count the number of bubbles coming out of its nozzle.
3) for the nutrients=
use hydrponics(put a rooted plant in water) now to control add calcium phosphate, Mg phosphate, NaHPO^4, and other nutrients(ask ur teacher) and prepare experimental setup with similar plant but without a particular nutrient(called the limiting factor) and see the growth.
4) for CO^2=
put the potted plant in O^2 room (if u hav one) and see for yourself.

Answer 3

light
keep plant in dark and test for glucose

keep plant in O2 free environment (a sealed beaker) and chek for glucose


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