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2021-05-15

Why is P680+ the strongest biological oxidizing agent?

Why is P680+ the strongest biological oxidizing agent?

Note: P680+ is the strongest biological oxidizing agent because it splits water into Hydrogen and Oxygen thus by oxidizing water P680 receives two electrons. P700* chlorophyll transfers its electron to the primary electron acceptor forming P700+.

What is the relationship between the wavelength of light and the quantity of energy per photon?

Wavelength of light is inversely related to quantity of energy per photon. When the wavelength is longer, energy is lower in a photon and vise versa. Quantity of energy per photon is directly related to the frequency of light which means that higher the frequency, higher is the energy and vise versa.

What happens to the free energy released as electrons are passed from photosystem II to photosystem I through a series of electron carriers?

What happens to the free energy released as electrons are passed from photosystem II to photosystem I through a series of electron carriers? It is used to establish and maintain a proton gradient. You just studied 39 terms!

What would be the expected effect on plants if the atmospheric CO2 concentration was doubled?

What would be the expected effect on plants if the atmospheric CO2 concentration was doubled? A. All plants would experience increased rates of photosynthesis.

How would you predict that doubling the atmospheric CO2 concentration would affect C3 plants?

What would be the expected effect on plants if the atmospheric CO2 concentration was doubled? C3 plants would have faster growth rates; C4 plants would be minimally affected. Select the correct molecule that is the main product of the Calvin cycle.

What wavelength of light in the figure is most effective in driving photosynthesis group of answer choices?

An action spectrum plots the rate of photosynthesis at various wavelengths of visible light, and it shows that blue light with a wavelength of about 490 nm is effective in driving photosynthesis.

What assumptions did Engelmann make in order?

What assumptions did Engelmann make in order to conclude that red and violet-blue light were more effective than green light in driving photosynthesis? They absorb blue/green light and reflect yellow and red wavelengths of light.

What is the difference between NAD+ and NADP?

NAD+ functions as an electron transporter, whereas NADP does not. NAD+ functions as a free energy source for cells, whereas NADP does not.

Why are C4 plants Photosynthesized?

Why are C4 plants able to photosynthesize with no apparent photorespiration? They use PEP carboxylase to initially fix CO2. CAM plants keep stomata closed in the daytime, thus reducing loss of water. A plant has a unique photosynthetic pigment.

Why do C4 plants avoid Photorespiration?

C4 plants largely bypass photorespiration by using an extension of the Calvin-Benson cycle to pump only CO2, and not oxygen, into the bundle sheath cells where the RUBISCO reaction occurs. C4 plants can maintain a high, local concentration of CO2 for RUBISCO activity without raising cellular oxygen levels.

What are the basic stages of Calvin cycle?

The Calvin cycle has four main steps: carbon fixation, reduction phase, carbohydrate formation, and regeneration phase. Energy to fuel chemical reactions in this sugar-generating process is provided by ATP and NADPH, chemical compounds which contain the energy plants have captured from sunlight.

Why does the Calvin cycle stop in the dark?

Though it is called the “dark reaction”, the Calvin cycle does not actually occur in the dark or during nighttime. This is because the process requires reduced NADP which is short-lived and comes from the light-dependent reactions.

What is the primary function of the Calvin cycle *?

carbon fixation