Apparatus for analyzing a test liquid, comprising: an inlet device defining at least one inlet chamber adapted to receive the test liquid; a preparation device defining at least one preparation chamber associated with the inlet chamber and including at least one preparation reagent to be reacted with the test liquid for preparing the test liquid; an analysis device defining at least one exposure chamber associated with the preparation chamber and including analysis means to be exposed to the prepared test liquid for indicating information on the test liquid; and a housing defining a longitudinal axis and having a proximal end and a distal end, wherein the inlet device is located proximal to the preparation device inside the housing and is moveable relative to the housing along the longitudinal axis towards the preparation device from a starting position, defining a starting condition of the apparatus, into a preparation position for establishing a flow connection for the test liquid from the inlet chamber to the preparation chamber in a preparation condition of the apparatus, characterized in that in said preparation condition the inlet device and the preparation device, which is located proximal to the analysis device within the housing, are jointly moveable relative to the housing along the longitudinal axis towards the analysis device from the preparation position into an analysis position for establishing a flow connection for the prepared test liquid from the preparation chamber to the exposure chamber in an analysis condition of the apparatus, further comprising guiding means configured to limit the motion of at least one device (11, 31, 71) to a sequence of alternating rotational and axial movements for guiding said at least one device (11, 31, 71), with each axial movement of the at least one device (11, 31, 71) in said sequence of movements requiring activation through a preceding rotational movement of the at least one device (11, 31, 71). an inlet device defining at least one inlet chamber adapted to receive the test liquid; a preparation device defining at least one preparation chamber associated with the inlet chamber and including at least one preparation reagent to be reacted with the test liquid for preparing the test liquid; an analysis device defining at least one exposure chamber associated with the preparation chamber and including analysis means to be exposed to the prepared test liquid for indicating information on the test liquid; and a housing defining a longitudinal axis and having a proximal end and a distal end, wherein the inlet device is located proximal to the preparation device inside the housing and is moveable relative to the housing along the longitudinal axis towards the preparation device from a starting position, defining a starting condition of the apparatus, into a preparation position for establishing a flow connection for the test liquid from the inlet chamber to the preparation chamber in a preparation condition of the apparatus, characterized in that in said preparation condition the inlet device and the preparation device, which is located proximal to the analysis device within the housing, are jointly moveable relative to the housing along the longitudinal axis towards the analysis device from the preparation position into an analysis position for establishing a flow connection for the prepared test liquid from the preparation chamber to the exposure chamber in an analysis condition of the apparatus, further comprising guiding means configured to limit the motion of at least one device (11, 31, 71) to a sequence of alternating rotational and axial movements for guiding said at least one device (11, 31, 71), with each axial movement of the at least one device (11, 31, 71) in said sequence of movements requiring activation through a preceding rotational movement of the at least one device (11, 31, 71).