1) A plant would be getting bigger and adding biomass mainly using photosynthesis and cellular respiration. Cellular respiration and mainly how the plants gain energy is by gathering nutrients and converting it into ATP. ATP can then be converted into sugars for energy and growth among the organism with the use of mitosis which is when the cells divide. 2) If the plant needs an enzyme in which are in the protein category, the proteins contain nuclear export signals which are recognized by receptors that guide RNA out of the nucleus.