In plants, Chlorophyll contains which central element?
Correct answer: B. Magnesium
- A. Iron
- B. Magnesium
- C. Phosphorus
- D. Nitrogen
Explanation
The molecular formulae for chlorophyll a and b are:Chlorophyll a : C55 H72 05 N4 Mg Chlorophyll b : C55 H70 06 N4 Mgchlorophyll a is the-most abundant and the most important photosynthetic pigment as it takes part directly in the light-dependent reactions which convert solar energy into chemical energy. It is found in all photosynthetic organisms except photosynthetic bacteria. Chlorophyll a itself exists in several forms difering slightly in their red absorbing peaks e.g. at 670, 680, 690, 700 nm. Chlorophyll b is found alongwith chlorophyll a in all green plants (embryophytes) and green algae.
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Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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