PS-I is named as it:
Correct answer: B. Discovered earlier than PS-II
- A. Absorbs wavelength of 680 nm
- B. Discovered earlier than PS-II
- C. Absorbs the wavelength of 700 nm
- D. Slightly located upward than PS-II
Explanation
The correct answer is that PS-I is named so because it was discovered before PS-II. The names of photosystems are assigned based on the sequence of their discovery, not based on the wavelengths they absorb or their position within the thylakoid membrane. Option A is incorrect because PS-I absorbs approximately 700 nm, not 680 nm. Option C, while correct about the absorption wavelength, does not explain the naming basis. Option D incorrectly associates naming with spatial location, which is not a factor in naming photosystems.
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.
More Bioenergetics questions
Which one of the following is not a carotenoid?
The location of the phytol tail of chlorophyll b is
All of the following are correct differences between Chl. 'a' and 'b' except:
Photosystem II has a reaction centre of
During cyclic photophosphorylation, electrons pass from all except:
Some photosynthetic organisms contain chloroplasts that lack photosystem II yet can survive. The best way to detect the "lack of photosystem II" in these organisms would be: