_6. every chemical reaction always involves which of the following?
a. a change in the state of matter.
c. a combination of compounds
b. a transfer of electrons between atoms d. some transfer of energy solid

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different

What is one affect on the australian environment due to the introduction of non-native european rabbits? (a) more grass grew in response to the need of the growing population of rabbits. (b) the rabbits balance out the food chain as they became a natural prey to many predators. (c) the rabbits the land by digging, which caused the soil to spread much needed nutrients. (d) the rabbits out-competed other small animals species and caused them to go extinct.

Restriction enzymes are used in making recombinant dna. describe the role restriction enzymes perform when constructing recombinant dna