Certain restriction enzymes produce cohesive (sticky) ends. this means that they a) make a staggered double-strand cut, leaving the ends with a few nucleotides of single-strand DNA protruding. b)cut in regions of high GC content, leaving ends that can form more hydrogen bonds than ends of high at content.c)cut both DNA strands at the same base pair. d) stick tightly to the ends of the DNA that they have cut. e)none of the above.