Chromium deficient animals show a decrease glucose tolerance.

This statement is true. Chromium deficient animals show a decrease glucose tolerance.  According to the recent studies, chromium-deficient diets resulted in impaired glucose tolerance, not only that, it can also result to hyperglycemia, and hyperinsulinemia,  It can also include nerve dysfunction.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

it's false. hope i .