During reduction, pga reacts with atp and nadph. what does atp contribute to the reaction?
carbon
hydrogen ions
electrons
phosphate group

The correct answer is electrons.

Explanation:

ATP also is known as adenosine triphosphate, refers to a molecule found in the cells of all the living species. It is considered to be very essential as it helps in transporting the energy that plays an essential role in all the cellular metabolic activities.  

The mentioned reaction is the second step of the Calvin cycle, also termed as reduction step. During the process, the electrons from NADPH and ATP are transferred to 3-PGA, which further gets reduced to produce G3P or glyceraldehyde-3-phosphate. Thus, ATP is providing electrons in the mentioned reaction.  

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