What statement best summarizes the relationship between photosynthesis and cellular respiration? (2 points)

two newly synthesized dna strands in each cell

one strand of original dna and a new strand in each cell

a dna molecule cleaved in half for each daughter cell

one cell has the original dna, the other has new dna

The chemical equation is basically the opposite:

Photosyntesis: water + CO2 -> O2 + sugar

Respiration: sugar + O2 -> CO2 + water

2) The DNA duplication is semiconservative, which means each new double chain contains 1 original molecule and 1 newly synthesized molecule.

When DNA is duplicated, each one of the molecules (chains) acts as a template for one of the chains that are being synthesized. Wherever there is an A in the old molecule, the new molecule will have a T. G goes with C, C goes with G and T goes with A. The way this happens is related to the number of hydrogen bonds (C and G have 3, whereas A and T have 2) and the molecular size (A and G have 2 cycles, whereas T and C have 1 cycle – so it is always a big one with a small one, total = 3 cycles). You can compare it with a chocolate mold: if you want a chocolate to be heart-shaped, you have to get a mold which has a heart-shaped hole and put the warm chocolate inside. So the mold and the chocolate have the opposite shape – complementary shape. But in this case, once the duplication process ends, mold and new DNA stay together as a brand new couple, and the mold never goes back with the other mold.

the answer would be d : p