Question  1: The topic sentence is "Believe it or not, the process of completing a DNA test is not very difficult.".
Question  2: The DNA testing process is made of 5 steps, which are:
Step 1: Human cells must be collected from a person's cheek.
Step 2: Send cell sample to a laboratory, where DNA will be extracted and multiplied.
Step 3: DNA samples are put into a gel and then are subjected to electric current.
Step 4: A DNA probe is then attached to the sample.
Step 5: A film of the DNA strand is developed.
Question  3: First of all, Ultimately
Question  4: DNA testing is now available to order from the internet.

Aristotelis Agisilaou, Christodoulos Menelaou, Markos Kleanthous