As compared to chlorophyll a, chlorophyll b has:
Correct answer: C. Two less hydrogen atoms and one more oxygen atom
- A. Two more hydrogen atoms
- B. One less oxygen atom
- C. Two less hydrogen atoms and one more oxygen atom
- D. Two more hydrogen atoms and one less oxygen atom
Explanation
Chlorophyll a and chlorophyll b differ primarily in one functional group attached to the porphyrin ring. In chlorophyll a, there is a methyl group (-CH₃), whereas in chlorophyll b, this group is replaced by a carbonyl group (-CHO). This difference accounts for chlorophyll b having two fewer hydrogen atoms and one more oxygen atom compared to chlorophyll a. The incorrect options either add hydrogen or remove oxygen, which are not characteristic of chlorophyll b's structure.
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