Duringphotosynthesis, the light-dependent reaction occurs in the .

Light, water, chlorophyll, and carbon dioxide are the basic requirements for this process.

Step 1: Carbon dioxide in the atmosphere enters the plant leaf through stomata, i.e., minute epidermal pores in the leaves and stem of plants which facilitate the transfer of various gases and water vapor.

Step 2: Water enters the leaves, primarily through the roots.

All organisms on Earth can be classified on the basis of twofundamental physiologic requirements:

Follow in the steps of van Helmont, John Woodward, Joseph Priestley and Jan Ingenhousz and discover photosynthesisIs plant growth affected by exposure to ultraviolet light?


Duringphotosynthesis, the light-independent reaction occurs in the .

In the first step a single water molecule is broken down into two hydrogen ions, half a molecule of oxygen, and two electrons by a process called , which literally means light splitting.


It's something to marvel at when it comes to the science of things.

How does the absorption of light by the chlorophyll pigmentsin the thylakoid membrane cause the conversion of light energy tochemical (ATP & NADHP) energy?

Effects of different colors of light on the photosynthesis rate.

The plants and cyanobacteria (which use water as a hydrogendonor and produce oxygen) have Photosystems I and II, whereas theless highly evolved other photosynthetic bacteria(which do notuse water as their hydgrogen donor and do not produce oxygen)have only Photosystem I.

The energyof their motion is used to make molecules of from and .

As the plant binds molecules into larger and larger chains, it captures and stores energy in the bonds to be released later. The plant uses the largest molecules to construct cell walls as the plant grows larger.

This isthe subject of the next discussion...

The effects of various pH levels on the photosynthesis process of the aquatic plant elodeaThe effects of phosphorous on the photosynthesis of aquatic plantsDoes light affect stem growth?

Steps of Photosynthesis - BiologyWise

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Steps of Photosynthesis Flashcards | Quizlet

The Z Scheme diagram shows the pathway of an electron fromwater (lower right) to NADP+ (upper left). It also shows theenergy relationships which are measured as voltage potentialshown on the scaleon the right. To raise the energy of theelectrons derived from water (+0.82 volts) to the level necessaryto reduce NADP+ to NADPH (-0.32 volts), each electron must beboosted twice (vertical red arrows) by light energy absorbed inPhotosystems I and II. After each boosting , the energizedelectrons flow "downhill" (diagonal black lines) and inthe process transfer some of their energy to a series ofreactions which ultimately adds a phosporus to ADP to producehigh energy ATP and reduces NADP+ to NADPH. There is analternative shunt whereby the electron flow turns back tocytochrome b563 (green line)and this is called and it occurs when there is no need for NADPH, so onlyATP is produced.