Read the following four statements, A, B, C and D, and select the correct option having both incorrect statements.
(A) Antennae molecules are made up of hundreds of pigment molecules bound to proteins.
(B) Antennae pigments help to make photosynthesis more efficient by absorbing different wavelengths of light.
(C) Only PS-II is functional in cyclic photophosphorylation.
(D) In PS-I, the reaction centre is chlorophyll a which absorbs light of only 680 nm.

(A) Antennae molecules are made up of hundreds of pigment molecules bound to proteins: This statement is correct. Antenna molecules, also known as light-harvesting complexes, are indeed composed of numerous pigment molecules, such as chlorophylls and carotenoids, bound to proteins. These pigment-protein complexes absorb light energy and funnel it to the reaction centers of photosystems.

(B) Antennae pigments help to make photosynthesis more efficient by absorbing different wavelengths of light: This statement is correct. Antenna pigments absorb light energy over a broader range of wavelengths than the reaction center pigments. By absorbing different wavelengths of light, antenna pigments enhance the efficiency of photosynthesis by maximizing light absorption and energy transfer to the reaction centers.

(C) Only PS-II is functional in cyclic photophosphorylation: This statement is incorrect. Cyclic photophosphorylation primarily involves Photosystem I (PS I), not Photosystem II (PS II). During cyclic photophosphorylation, only PS I is functional, as it can generate ATP through cyclic electron flow. PS II is not directly involved in cyclic photophosphorylation.

(D) In PS-I, the reaction center is chlorophyll a which absorbs light of only 680 nm: This statement is incorrect. In Photosystem I (PS I), the reaction center pigment is indeed chlorophyll a, but it absorbs light of longer wavelengths, around 700 nm (known as P700), rather than 680 nm.

Therefore, option (C) and option (D) contain both incorrect statements.