Cell - The Unit of Life question bank (Biology)

Two spherical unicellular organisms, X and Y, have the same cytoplasmic composition, metabolic pathways, and live in identical nutrient-rich aerobic conditions. The diameters of X and Y are, respectively, $10$ and $20$ $\mu m$. When nutrients are not limiting, the ratio of total oxygen consumption per hour per cell of organisms Y to X is:

A researcher incubated algal cells with a fluorescent-labelled cytidine analogue that can enter the cells and get incorporated into nucleic acids. The cells were lysed and different membrane-bound organelles were isolated. The membrane-associated ribosomes were removed and the organelles were then homogenized. The macromolecules thus isolated from each organellar fraction were analysed. The organelle fractions that show incorporation of the fluorescence signal are ______.