In genetic engineering, sticky end refers to __________.

• A. a technique for finding a gene of interest within a nucleus without destroying the cell
• B. the ability of plasmids to stick to a bacterial cell wall and thus be taken up into the bacterium
• C. the site on mRNA that sticks to the DNA during transcription
• D. None of the listed responses is correct.
• E. short bits of single-stranded DNA left at the end of DNA molecules cut by restriction enzymes

Answer: (E)

Verified step by step guidance

1. Understand that 'sticky ends' are a concept in genetic engineering related to DNA manipulation.
2. Recognize that restriction enzymes are used to cut DNA at specific sequences, creating fragments.
3. Learn that when restriction enzymes cut DNA, they often leave overhanging single-stranded ends, known as 'sticky ends'.
4. These 'sticky ends' can form hydrogen bonds with complementary sequences, facilitating the joining of DNA fragments.
5. Conclude that 'sticky ends' are short bits of single-stranded DNA left at the end of DNA molecules cut by restriction enzymes, which is not directly described by any of the given options.