Why do most biologists no longer refer to the reactions of the Calvin cycle as the "dark reactions"?

Answer 1

It's not accurate to say they happen in the dark because you need the products from the light dependent reaction (ATP and NADPH) for the Calvin cycle to take place. In the dark there are no photons to excite an electron from chlorophyll. No proton gradient develops so no ATP is made and the electrons from chlorophyll don't get excited and passed to NAPD+ to make NADPH. Carbon dioxide can't be fixed to form sugars without these compounds so the "dark" reaction actually do NEED light (albeit indirectly).

Answer 2

because of the fact it does not rather ensue plenty on the hours of darkness. Photosynthesis, which contains the Calvin cycle, happens generally in the day time. At nighttime (so what's the "actual" darkish reactions), starch shops are mobilized, and respiration dominates. larger flora are rather hormonally controlled the place at nighttime, photosynthetic mechanisms close down (which contains the Calvin cycle), and respiration will advance; vice versa in the sunlight hours.

Answer 3

Because it can occur during the daytime. These days, we just call 'em the "light independent reactions of photosynthesis" or the "carbon fixing reactions."

Answer 4

the calvin cycle is anaerobic. This means it doesn't require oxygen.

"dark" used to be used for saying anaerobic, but it is very inaccruate to say dark.