What function does NADPH serve in photosynthesis? | …

This article provides information about lactic acid production, and how it helps to provide energy.

What and where is the source of NAD+ in the light cycle …

Nicotinamide adenine dinucleotide phosphate or NADPH is a reduced that plays a key role in the synthesis of carbohydrates in photosynthetic organisms. It is the reduced form of NADP+ and as such is a high energy molecule that helps drive the . NADPH is formed during with the use of light energy in the of . It then represents an energy currency that can be used in the Calvin cycle and subsequent reactions to produce carbohydrates.

Theory: Before I predict what will happen I must look at how photosynthesis occurs.

What is the role of NADH in photosynthesis? | Yahoo …

The result of two light reactions is a total of six oxygen molecules (6 O2) released into the air as byproducts and 12 NADPH2 (24 H) carried over to the dark reaction of photosynthesis....

Reaction: photosynthesis of Canadian pondweed (Elodea) Introduction- what is photosynthesis.

In summary, may yield a maximum of 38 ATP molecules, while eukaryotic cells have a net yield of 36 ATP molecules. In eukaryotic cells, the NADH molecules produced in glycolysis pass through the mitochondrial membrane, which "costs" two ATP molecules. Therefore, the total yield of 38 ATP is reduced by 2 in eukaryotes.

In order for photosynthesis to occur sunlight, carbon dioxide, and water are essential, however oxygen is produced in the process.


What does NADH molecules do for both photosynthesis …

In PS2 there are 35 chlorophylls. Seven of them use water for ligand to the Mg ion, while the rest use His (as shown in the example above). Why might there be so many chlorophylls in PS2? The chlorophylls (Chl) are arranged in a very specific arrangement as shown below.

Is NADH produced in photosynthesis? - …

The half reaction reduction potential for S -> H2S is +0.14 volts, so the potential difference for the reaction H2S+ NAD+ -> NADH + S is only -0.46 volts, making photosynthesis much easier (starting with water we needed -1.14 volts).

to light in plant photosynthesis?

A new mechanism has been proposed based on the recent crystal structure. A possible model for S3 is shown below with the distorted cubane structure and with an oxy and oxyl ligands. Add a curved arrow to show how an oxygen-oxygen bond is made.

NADH vs. NADPH: Where is each one used and why …

Plants have evolved a great ability to absorb light over the entire visible range of the spectra. Can they absorb to much energy? The answer is yes, so plants have developed many ways to protect themselves. IF too much light is absorbed, the pH gradient developed across the thylacoid membranes becomes greater. This is sensed by a protein, PsbS, and through subsequent conformational changes transmitted through the light-harvesting antennae, the excess light energy is dissipated as thermal energy. Mutants lacking PsbS showed decreased seed yield, a sign that it became less adaptable under conditions of stress (such as exposure to rapidly fluctuating light levels). Molecules called xanthophylls (synthesized from carotenes - vit A precursors) such as zeaxanthin are also important in excess energy dissipation. These molecules appear to cause excited state chlorophyll (a singlet like excited state dioxygen) to become deexcited. Without the xanthophylls, the excited state chlorophyll could deexcite by transfer of energy to ground state triplet dioxygen, promoting it to the singlet, reactive state, which through electron acquisition, could also be converted to superoxide. These reactive oxygen species (ROS) can lead to oxidative damage to proteins, lipids and nucleic acids, alteration in gene transcription, and even programmed cell death. Carotenoids can also acts as ROS scavengers. Hence both heat dissipation and inhibition of formation of ROS (by such molecules as vitamin E) are both mechanism of defense of excessive solar energy

To understand photosynthesis and respiration, ..

The amino acid side chains that interact with the OEC are shown below. The coordination number for all the Mn ions (including interacting waters) is identical. What is it for Mn1? For Ca? (Note that the Ala 344 is at the carboxy terminus of one of the protein subunits.)