AP Biology assist » tree Biology » Photosynthesis » know light dependent reactions
Explanation:

Photosynthesis starts with energy from light being converted to chemical energy. The only answer explanation accurately explaining this process describes the counter of light power (photons) to chemical energy (excited electrons).

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Photons present in irradiate strike and also excite electrons in chlorophyll.

The photons are extremely energized light particles, which strike chlorophyll and excite and cost-free electrons in the chlorophyll molecule. These excited electrons pass through the electron transfer chain and also their energy is gathered to do ATP.


Explanation:

During the light reactions water is split and the by-product is oxygen. Oxygen is then released ago into the atmosphere. Street are produced during the Calvin cycle and also are no a direct product of the irradiate reactions.


The irradiate reactions of photosynthesis space responsible for the production of which of the following molecules?


Explanation:

The light reactions room the measures of the photosynthesis that role to transform solar energy into chemical power that can be used during the Calvin cycle. The irradiate reactions use solar energy to reduce

*
 to
*
 and to transform
*
 to
*
.


Explanation:

The light reactions of photosynthesis occur in the thylakoid membranes inside of chloroplastic in tree cells. Photosynthesis relies on the buildup of a proton gradient across a membrane to create ATP. The optical membrane is an organelle existing only in plants. The phospholipid bilayer and cell wall surface surround plant cells, and are not associated in photosynthesis.


Explanation:

The molecule is reduced due to the fact that when a molecule benefit an electron, it is claimed to it is in reduced. The price oxidized would have been liked if the molecule shed an electron. Plasmolysis has actually nothing to perform with the acquire or ns of an electron, and also the term redoxed does not fit right into this question. Hydrolysis is once a link is broken using water, so that is incorrect together well.


Explanation:

The light dependent reaction converts solar power to chemistry energy, making use of the photosystem to capture light energy, and ultimately develop ATP and also NADPH. Pigment molecules in the photosystem absorb photons the light, which then reach the chlorophyll, exciting electrons in the chlorophyll. The excited electron climate is transferred to a major electron acceptor of the electron carry chain (and is changed by the splitting of water (to create O2, H+ and also e-)).


During the irradiate dependent reaction, what is the objective of developing a proton gradient in the optical membrane lumen?


To generate 

*


To create 

*


Explanation:

The ATP synthase protein is installed in the thylakoid membrane. Once sunlight is captured by photosystem II in the irradiate dependent reaction, water is split, producing O2 and also 2 H+ ions and 2 electrons. Together the electrons circulation down the electron move chain, this energy is used to pump hydrogen ion from the stroma into the thylakoid space, creating a high concentration that hydrogen ions inside the optical membrane lumen. Eventually, the hydrogen ions then circulation from the area that high concentration (in the optical membrane lumen) come an area of low concentration (in the stroma ), with the ATP synthase protein. The motion of the hydrogen ions v this structure combines ADP with phosphate, creating ATP.


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Example question #8 : understand Light Dependent reaction


Which does not occur throughout the light dependent reaction?


Possible Answers:

carbon fixation is aided through the enzyme Rubisco


NADPH is produced


*
 is split, creating H+ ions, oxygen, and electrons


ATP is produced


Correct answer:

carbon fixation is aided by the enzyme Rubisco


Explanation:

Carbon fixation, catalytic analysis by Rubisco, occurs throughout the first step the the irradiate independent reaction.


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Example question #9 : know Light Dependent reaction


What commodities of the light dependent reaction are crucial for the light independent reaction come occur?


Possible Answers:

ADP and also NADP+


ATP and NAPH


ATP and NADP+


ADP and also NADP+


Correct answer:

ATP and NAPH


Explanation:

 ATP and NADPH are produced during the irradiate dependent reaction, and are reactants crucial for the irradiate independent reaction (Calvin Cycle) come occur. During the light independent reaction, ATP and NADPH are provided to transform phosphoglycerate molecules (PGA) to glyceraldehyde-3-phosphate molecules (G3P). G3P is then supplied to create glucose.


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Example question #10 : recognize Light Dependent reaction


Which is true of light dependent reactions?


Possible Answers:

ATP is a product


GTP is a reactant


*
 is a reactant


NADP+ is a product


Correct answer:

ATP is a product


Explanation:

Light dependent reactions convert solar energy to chemical power (in the type of ATP and also NADPH). Sunlight and H2O room the reactant of the light dependent reaction. The sunlight is captured by photosystem II, and is supplied to excite electrons. Separating of H2O to produce hydrogen ions offered to develop the proton gradient, and also electrons developed replace the electrons transferred to the major electron acceptor.


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