Let’s explore antibodies a little more. Chapter 16 of the textbook covers Antibodies with the figure below. Which of the following are true of antibodies?

A protein with quaternary structure having 2 longer “heavy chains” and 2 “light chains”.
A protein secreted by B lymphocytes into body fluids with binding sites for 2 antigens.
Proteins recognized very specifically and bound by white blood cells called lymphocytes.
All of the above

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

multiply it by 5 in order for you to understand i cant give an exact answer.