PHOTOSYNTHESIS IN HIGHER PLANTS PowerPoint PPT …

Behrenfeld MJ, Bale A, Kolber Z, Aiken J and Falkowski PG (1996) Confirmation of iron limitation of phytoplankton photosynthesis in the equatorial Pacific Ocean. Nature 383: 508–511.

  Factors affecting photosynthesis : 1. Light  2. Carbondioxide  3. Temperature  4. Water

7. Look at leaves of the same plant on the shady side and compare it with the leaves on the sunny side. Or, compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green? Why?
Ans.
Light is a limiting factor for photosynthesis. Leaves get lesser light for photosynthesis when they are in shade. Therefore, the leaves or plants in shade perform lesser photosynthesis as compared to the leaves or plants kept in sunlight.
In order to increase the rate of photosynthesis, the leaves present in shade have more chlorophyll pigments. This increase in chlorophyll content increases the amount of light absorbed by the leaves, which in turn increases the rate of photosynthesis. Therefore, the leaves or plants in shade are greener than the leaves or plants kept in the sun.


photosynthesis by which plants manufacture carbohydrates using raw ..

NCERT Solutions for class-11 Biology chapter-13 Photosynthesis in higher plants. NCERT Solution for class XI Biology are also available for

5. Suppose there were plants that had a high concentration of Chlorophyll-b, but lacked chlorophyll-a, would it carry out photosynthesis? Then why do plants have chlorophyll-b and other accessory pigments?
Ans.
Chlorophyll-a molecules act as antenna molecules. They get excited by absorbing light and emit electrons during cyclic and non-cyclic photophosphorylations. They form the reaction centres for both photosystems I and II. Chlorophyll-b and other photosynthetic pigments such as carotenoids and xanthophylls act as accessory pigments. Their role is to absorb energy and transfer it to chlorophyll-a. Carotenoids and xanthophylls also protect the chlorophyll molecule from photo-oxidation. Therefore, chlorophyll-a is essential for photosynthesis.
If any plant were to lack chlorophyll-a and contain a high concentration of chlorophyll-b, then this plant would not undergo photosynthesis.


Photosynthesis PPT This PowerPoint was revised June 24, 2008

All these may combine together and act at times to reduce oxygencompletely, especially in shallow plankton-rich waters in highambient temperatures such as in the fish pond.

There is a TEKS Photosynthesis Notes handout to ..


Chemiosmotic Hypothesis : Chemiosmotic hypothesis explain the mechanism of ATP synthesis in chloroplast. In photosynthesis, ATP synthesis is linked to development of a proton gradient across a membrane. The electrons are accumulated inside of membrane of thylakoids (in lumen). ATPase has a channel that allows diffusion of protons back across the membrane. Thisreleases energy to activate ATPase enzyme that catalyses the formation of ATP.

Photosynthesis ppt | Photosynthesis | Plants


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Things to remember!
When there is no light, photosynthesis can't occur since light is the activation energy needed for plants to convert carbon dioxide and water to glucose and oxygen
When there is no light, the plants would use up oxygen therefore emitting carbon dioxide bubbles instead.
The plants should be given a couple minutes to start initiating the process of photosynthesis before you start timing.
The Scenario:
Reona and Michael have been growing aquatic plants for a while, specifically Elodeas which is a type of pond weed.

• Higher light intensity, faster the rate of


Photosynthesis :
Photosynthesis is an enzyme regulated anabolic processof manufacture of organic compounds inside the chlorophyll containing cellsfrom carbon dioxide and water with the help of sunlight as a source of energy.