Giancarlo sets up 5 test tubes: pH 3, pH 5, pH 7, pH 9, and pH 11. Each test tube has 50 g of the pH buffer solution, 10 g of the enzyme DNA polymerase, and 50 g of the enzyme's substrates (a short piece of a DNA chromosome and free RNA nucleotides). He measures the activity rate of DNA polymerase in each test tube by measuring how many copies of the DNA chromosome it produces as products of its reaction. Which statement BEST describes the components of Giancarlo's experiment?

Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.