AP BIOLOGY

Detailed explanation-1: -In the first part of photosynthesis, the light-dependent reaction, pigment molecules absorb energy from sunlight. The most common and abundant pigment is chlorophyll a. A photon strikes photosystem II to initiate photosynthesis.

Detailed explanation-2: -Photosynthesis begins when light strikes Photosystem I pigments and excites their electrons. The energy passes rapidly from molecule to molecule until it reaches a special chlorophyll molecule called P700, so named because it absorbs light in the red region of the spectrum at wavelengths of 700 nanometers.

Detailed explanation-3: -First, photosystem II absorbs a photon, which excites an electron causing it to go to the electron acceptor, which means that photosystem II is now missing an electron. It regains the electron from water, producing oxygen.

Detailed explanation-4: -When light is absorbed by one of the many pigments in photosystem II, energy is passed inward from pigment to pigment until it reaches the reaction center. There, energy is transferred to P680, boosting an electron to a high energy level.

Detailed explanation-5: -Sunlight is trapped, and chlorophyll is used for this process. The first process of this process is to entrap light. This step occurs as light reactions that involve photophosphorylation reactions involving photosystems I and II. The entrapped light is used in the formation of energy such as ATP and NADH.