Which of the following statements is true about the structure of the cell membrane? a. the two layers of the plasma membrane are identical b. the plasma membrane is a rigid structure c. the proteins on the two layers are not identical d. proteins are found only on one surface of the membrane

the calvin cycle has three stages. in stage 1, the enzyme rubisco incorporates carbon dioxide into an organic molecule. in stage 2, the organic molecule is reduced. in stage 3, rubp, the molecule that starts the cycle, is regenerated so that the cycle can continue

i believe the answer would be b. hope it : )