A student coming out cell fractionation of a tissue and forgot to label his tubes. The contents of one tube when studied showed organelles bounded by membrane with activity of catalase enzyme. These organelles could be :-

Proteins P,Q, and R are associated with intact organellar membrane in a cell. If the intact organelles is treated with a high ionic strength buffer, only protein R remained associated with the membrane fraction. Based on this, one could conclude that

Centrifugation of a cell results in the rupture of the cell membrane and the contents compacting intoapellet in thebottom of the centrifuge tube. Bathing this pelletwith a glucose solution yields metabolic activity including the production of ATP. One of the contents of this pellet is most likely which of the following?