57-60 The O_2 gas produced during photosynthesis is derived from A) CO_2. B) glu

Question

57-60

The O_2 gas produced during photosynthesis is derived from A) CO_2. B) glucose. C) water. D) carbon monoxide. E) bicarbonate ions. When a photon interacts with molecules such as those within chloroplasts, the ph A) bounce off the molecules, having no effect. B) pass through the molecules, having no effect. C) be absorbed by the molecules. D) Both a and c E) a, b, and c Photosynthesis is divided into two main phases, the first of which is a series of reactions that requires the absorption of photons. This phase is referred to as the A) reduction phase. B) dark reactions phase. C) carbon fixation phase. D) light dependent phase, or photophosphorylation. E) None of the above When a photon is absorbed by a molecule, what happens to the photon? A) It loses its ability to generate any energy. B) It raises the molecule from a ground state of low energy to an excited state. C) The exact relationship of the photon to the molecule is not clearly understood. D) It causes a change in the velocity of the wavelengths. E) None of the above

Explanation / Answer

57 . photosynthesis is two stage process 1 The light dependent reaction which occures in grana and require energy .

light energy trapped by chlorophyll ti make ATP

at the same time water split into oxygen

to prove that if havy water is used for photosythesis than oxyge eliminated is O18

58. when a photon reaches the chorophyll in the reaction center , the chlorophyll recieve energy because it absorb photon.

59. light drpendent reaction require sun light . in this reaction energy from sunlight is absorbed by chlorophyll and converted into chemical energy.

60. The energy from the light excites an electron from its ground level to an exited energy level . for most compound that absorbed light returned to the ground state and the absorbed energy is converted into heat energy.

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