Question

DNA codes for the sequence of amino acids in the primary structure of a protein, but not for sugars or lipids. This is because?A. only proteins are involved in living metabolic reactions. B. sugars and lipids code for their own replication. C. sugars and lipids are ever present in the living environment and are not used in living structures. D. other hereditary molecules code for sugars and lipids. E. proteins are the main structural and functional components of cells.

Answer 1

Answer:

E. proteins are the main structural and functional components of cells.

Explanation:

DNA sequence codes for proteins since proteins are the main structural and functional components of cells. Proteins are structural components of cell membranes. The DNA packaging proteins pack the DNA into chromatin. The immune system distinguishes the self from non-self by identification of specific peptides present on the cell surfaces.

Hemoglobin is the oxygen carrier protein of RBCs. Immunoglobulins are one of the most abundant proteins of blood serum and are responsible for adaptive immune response. Enzymes are proteins with catalytic functions. Myosin and actin are the major structural and functional proteins of muscle cells. Proteins with different primary structures perform these diverse functions.