Suppose one restriction enzyme (enzyme A, which targets a given sequence) makes one cut in a linear DNA fragment, and another restriction enzyme (enzyme B, which targets another distinct sequence) makes another cut in that same DNA. The cuts are not in the same place, and no two cut fragments are exactly the same size. The restriction digest is set up on an electrophoresis gel. How many bands should appear on the gel if both enzymes, A and B, are used in the restriction digest

Recently, crops of vegetables such as lettuce and green onions have been contaminated, while they are still on the farm, with bacteria that cause food poisoning. how will science influence the way the government responds to prevent an increase in food-borne diseases? because science has shown that lettuce and green onions are not nutritionally valuable, the government may pass laws that ban the sale of lettuce and green onions. because science has shown that there is no way to prevent bacterial contamination, the government may pass laws that punish businesses that buy lettuce and green onions. because science has shown that the washing of hands prevent the spread of infectious diseases among people, the government may pass laws that require hand washing by everyone who handles food. because science has shown there are ways to find the source of the contamination, the government may pass laws that require farm practices that reduce the contamination of lettuce and green onions.