9. Which class of organic compounds is used by the body for cell repair and growth? (1) carbohydrates
(3) minerals
(2) proteins
(4) lipids

Proteins

Explanation:

Minerals are not organic compounds, and carbs and lipids do not repair/grow cells (lipids are primarily used to store energy and insulate/protect the body and carbs provide a short boost of energy).

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

cells spend most of their time in interphase