CBSE Class 10 Answered

FADH is the reduced form of flavin adenine dinucleotide (FAD). FADH is involved in harvesting of high-energy electrons from carbon fuels.

Nicotinamide adenine dinucleotide exists in two forms: an oxidized and reduced form abbreviated as NAD⁺ and NADH respectively. NADH can then be used as a reducing agent to donate electrons.

Krebs cycle is the series of chemical reactions used by all aerobic organisms to generate energy.

Photosystems are functional and structural units of protein complexes involved in photosynthesis that together carry out the primary photochemistry of photosynthesis: the absorption of light and the transfer of energy and electrons.