Biology question?

Question

Antibodies are produced in response to the presence of foreign molecules. The antibody helps to remove toxic molecules from our body fluids by forming tight complexes that are held together by weak forces. The ability of the antibody to make tight complexes with other molecules occurs through weak interactions. How can weak interactions produce a very strong bond between an antibody and the foreigh molecule?

weak attractive forces can easily be converted to covalent bonds
weak attractive forces become strong in a hydrophobic environment
one kind of weak force will be repeated to make the bond strong
several of the weak forces together cause a strong attraction
water causes weak forces to become strong

Answer 1

From your multiple choices, the first two and the very last one are dead wrong. The correct one is "several weak forces together cause a strong interaction". Depending on the molecule and its structure you will have different types of interactions (ideally a charged group of opposite charge interacting with a charged group of the molecule in question, hydrogen-bond forming groups with similar groups, hydrophobics interacting with hydrophobics, etc)

Answer 2

Your presumption that antibodies work primarily due to weak or strong molecular forces is oversimplific.

Antibodies primarily work due to the stereochemistry(the 3-d dimensional structure) of the molecules involved. It's like putting a key into a doorlock. If it fits, not much force is needed. If it doesn't fit, no amount of force will allow it to work properly.

And it's as simple as that!

Answer 3

Do your own homework.