In this section, each item consists of six sentences of a passage. The first and sixth sentences are given as SI and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly.

S1: Organisms look similar because their body designs are similar.
P: Thus, reproduction at its most basic level will involve making copies of the blueprints of body design.
Q: The chromosomes in the nucleus of a cell contain information for the inheritance of features from parents to the next generation in the form of DNA
R: The DNA in the cell nucleus is the information source for making proteins. 
S: If body designs are to be similar, the blueprints for these designs should be similar.
S6: If the information is changed, different proteins will be made.