Electrons that enter the light reactions of photosynthesis c

Electrons that enter the light reactions of photosynthesis can be traced through all the photosynthesis processes ending up in a molecule that can be later used in respiration. These same electrons can then be tracked through the processes of respiration. Put the below options in order starting with which molecule the electrons originally come from (at the beginning of photosynthesis) and ending with the molecule on which they ultimately end up (at the end of respiration). You will need to use 7 of the options ONCE and 1 of the options TWO times. You will not use 2 of the options. Options: NADPH, NADH, PS II, G3P, H2O, O2, Complex 1, PS 1, Ubiquinol (Q), and CO2

Solution

Electrons that enter the light reactions of photosynthesis can be traced through all the photosynthesis processes ending up in a molecule that can be later used in respiration. These same electrons can then be tracked through the processes of respiration.

Below is the order starting with a molecule that the electrons originally come from (at the beginning of photosynthesis) and ending with the molecule on which they ultimately end up (at the end of respiration).

H2O - O2 - PS II - PS I - NADPH - CO2 - NADPH - G3P

Here, 7 of the options are used once, 1 of the option used twice, and 2 of the options are not used.