Chlorophyll consists of:
Correct answer: D. A head of four pyrrol rings and a phytol tail
- A. A head of phytol and tail of four pyrrole rings
- B. A head of linked carbons and tail of four pyrrole rings
- C. A head of four pyrrol rings and tail of linked nitrogen
- D. A head of four pyrrol rings and a phytol tail
Explanation
A chlorophyll molecule has two main parts; one flat, light absorbing hydrophilic head and the other long, anchoring, hydrophobic hydrocarbon tail. The head is complex porphyrin ring which is made up of four joined smaller pyrrole rings.
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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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