Why is the calvin cycle considered a dark reaction? a. it occurs only at night. b. it requires an absence of light. c. it turns the plant dark green. d. it can proceed in the dark.

Answer is D. It can proceed in the dark. Took the test.

The correct answer would be d. It can proceed in the dark.

Calvin cycle or Benson-Calvin cycle refers to the set of chemical reactions involved in fixing the carbon from carbon dioxide into the sugar or glucose.

It generally occurs in the stroma of the chloroplast and does not require the input of solar energy that is, it can occur in dark. It is the reason that it is also termed as the dark reaction.

However, it depends on the products of light reaction which are NADPH and ATP.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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