Fill in the blanks:

(1) The construction of the first recombinant DNA emerged from the possibility of linking a gene encoding antibiotic resistance with a native _______ of _______.

(2) Hind II always cut DNA molecules at a particular point by recognizing a specific sequence of _______ base pairs. This specific sequence is known as _______ for Hind II.

(3) The _______ in DNA is a sequence of base pairs that reads same on the two strands when orientation of reading is kept the same.

(4) ________, a pathogen of several dicot plants is able to deliver a piece of DNA known as ________ to transform normal plant cells into tumor cells.