The porphyrin ring represents the:
Correct answer: A. Light-absorbing part of chlorophyll
- A. Light-absorbing part of chlorophyll
- B. Hydrophilic tail of chlorophyll
- C. Metal ion center
- D. Electron transport chain component
Explanation
The porphyrin ring represents the light-absorbing part of chlorophyll. It contains a magnesium ion at its center and a cyclic structure of carbon and nitrogen atoms that absorbs red and blue light for photosynthesis. Its hydrophilic nature allows it to interact with the aqueous environment of the chloroplast, while the phytol tail anchors the molecule into the membrane. This arrangement ensures efficient capture of light energy and proper positioning within the photosynthetic machinery.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Bioenergetics
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.
Practise Bioenergetics
1,378 free Bioenergetics MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.