Select the true statements regarding antibody (specifically, immunoglobulin G) structure.

a. Both the Fab and Fc fragments have variable domains.
b. The antigen‑binding site is formed as a combination of variable domains from one heavy and one light chain.
c. The heavy and light chains are linked by noncovalent and disulfide bonds.
d. The antigen‑binding site is located in the Fab fragment.
e. Only the Fc fragment has constant domains.

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d

What advantages does a pedigree have over a written passage?