Which one of the following statements correctly defines active site? a. the active site is a site on the enzyme molecule where specific substrate molecules bind. b. the active site is a site on the substrate molecule where specific enzyme molecules bind. c. the active site is a site on the substrate molecule where specific product molecules bind.

What is an endocrine function? (apex) a.esophageal glands release mucus into the esophagus b.salivary glands release saliva into mouth c.swear glands release sweat to the skin d.the pineal gland releases melatonin into the bloodstream

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.