AP BIOLOGY

LABORATORY REVIEW

CELL RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
what is photolysis
A
water split by air
B
water joined by glucose
C
water split by light
D
water separated by waves
Explanation: 

Detailed explanation-1: -Photolysis is the splitting of water molecules in the presence of light into proton, electron and oxygen. It takes place during non-cyclic photophosphorylation. The protons are used to reduce NADP and electrons are fed to photosystem II.

Detailed explanation-2: -During the light reaction, light energy is utilized. By using light energy, water is split to form oxygen, and hydrogen and electron are released. This is known as the photolysis of water.

Detailed explanation-3: -The splitting of water molecules is called photolysis of water. During the light reaction of photosynthesis, the absorption of light by the chlorophyll results in the loss of the electron from it. In order to fulfill the electron requirement, the water molecule splits and donates the electron to the chlorophyll.

Detailed explanation-4: -This absorption of light energy helps split water molecules into hydrogen and oxygen, generating free electrons. Each splitting of a water molecule releases a pair of electrons that form the electron transport chain and initiate the pumping of hydrogen molecules into the inner part of the chloroplast called thylakoid.

Detailed explanation-5: -It is the splitting of water molecules in the presence of light into a proton, electron, and oxygen. It occurs in the lumen of thylakoid sacs. Protons are used to reduce NADP and electrons are fed to photosystem II.

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