Ascientist uses materials in her lab to cut a dna sample into fragments.
what process is the scientist using?
a. gel electrophoresis
b. use of restriction enzymes
c. polymerase chain reaction (pcr)
d. karyotyping

use of restriction enzymes

Explanation: C. Use of restriction enzymes

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.