Grana, thykaloids and storma are components found in the chloroplast within plant cells
A makes the most sense, though D could actually be an Ok reason, the other two aren't reasonable, a fire safety action? The door would be better open in a fire emergancy, it makes a quicker escape
<span>Once the enzyme binds to the specific substrate molecule, structural changes can occur in the active site to accommodate the product. This structural change lowers the activations energy and increases the rate of the reaction. The active site changes its shape until an enzyme-substrate complex is formed and activated.</span>