The information in the passage suggests that in mice CRY1 likely affects XPA by repressing the XPA-encoding gene transcription as shown in the graph which indicates a lowering of XPA levels when CRY1 levels is raised.
<em>A- The Archaea have cell membranes made of ether-linked hydrocarbons which branch, while Bacterial membranes are made of ester-linked fatty acids.</em>
