AP BIOLOGY

Detailed explanation-1: -Solution : Photosynthesis is a redox process. It includes reduction of carbon dioxide to organic carbon compounds such as sugar and oxidation of water to oxygen.

Detailed explanation-2: -During true photosynthesis, the carbon dioxide is reduced and water is oxidized. The carbon dioxide is reduced to glucose and the water is oxidized to release oxygen in the presence of sunlight to synthesize nutrients such as carbohydrates in the form of glucose and release oxygen.

Detailed explanation-3: -Yes, this is a redox reaction. CO is the reducing agent. because C is oxidized. H2O H 2 O is an oxidizing agent because H is reduced.

Detailed explanation-4: -The most reduced form of carbon is CH4, the most oxidized is CO2. Thus the oxidation state of a one-carbon fragment is unambiguous and defined by the number of C-H bonds that have been replaced by C-X bonds, where X = any electronegative element (see periodic table on previous page).

Detailed explanation-5: -Short communication. Oxidation of water in photosynthesis☆ The latter pool of manganese acts as an electron carrier and an electron trap. It is proposed that water is oxidised in the enzyme system to form H2O2 and O∓2 as transient species, and finally liberates O2. This pathway is energetically feasible.