1The initial absorption of a photon occurs in the antenna co

1.The initial absorption of a photon occurs in the antenna complex. What process funnels the energy towards the site of chemistry?

A. Electron transfer

B. proton pumping

C. ion channels

D. energy transfer

2. The electron transport chains in mitochondria and photosynthesis are essentially similar, however in mitochondria there are more types of proton-pumping complexes.

A. True

B. False

3. Plants perform photosynthesis; they do not utilize cellular respiration performed in mitochondria.

A. True

B. False

Solution

1.d energy transfer

Photosynthesis is initiated by the absorption of a photon by an antenna molecule, which occurs in about a femtosecond (10-15 s) and causes a transition from the electronic ground state to an excited state. Within 10-13 s the excited state decays by vibrational relaxation to the first excited singlet state. The fate of the excited state energy is guided by the structure of the protein. Because of the proximity of other antenna molecules with the same or similar energy states, the excited state energy has a high probability of being transferred by resonance energy transfer to a near neighbor. Exciton energy transfer between antenna molecules is due to the interaction of the transition dipole moment of the molecules.

2 . True mitochondria there are more types of proton-pumping complexes.

3.false photosynthesis andcellular respiration help each other. Duringphotosynthesis, the plant needs carbon dioxide and water-- both of which are released into the air during respiration. And duringrespiration, the plant needs oxygen and glucose, which are both produced throughphotosynthesis