What are the pieces formed after DNA cutting called?

Correct answer: DNA fragments

The direct answer is option A: DNA fragments. DNA is a long molecule made of nucleotides joined in a chain. During restriction digestion, restriction enzymes cut this long DNA at particular recognition sites. The original long molecule is consequently divided into smaller pieces, and each piece is called a DNA fragment. Option A is correct because it names exactly the products of DNA cutting. Option B, protein folds, refers to shapes or arrangements of proteins, not pieces of DNA. Option C, lipid droplets, are associated with fats and membranes, not restriction digestion. Option D, starch grains, are carbohydrate storage structures in plants and are unrelated to DNA cutting. The resulting fragments can be separated according to size by gel electrophoresis, where smaller pieces generally move farther through the gel. A useful memory cue is: restriction enzyme cuts DNA, so the immediate products are restriction fragments or DNA fragments.