The hormone human chorionic gonadotropin (hCG) is filtered by the kidneys and can be detected in urine to confirm pregnancy.
Which of the following properties of hCG allows it to pass through the glomerular filtration barrier and enter the kidney tubule?
hCG is a glycoprotein with highly branched carbohydrate side chains
hCG is a polar molecule that dissolves readily in blood plasma
hCG has a molecular mass of less than 69,000
hCG is composed of two distinct polypeptide subunits