Nonpolar amino acid residues are typically found in the interior of globular proteins like chymotrypsin. which chemical force is most directly responsible?

The chemical force most directly responsible in the given case is hydrophobic interactions.  

The hydrophobic interactions illustrate the associations between the hydrophobes, that is, low water-soluble molecules, and water. Hydrophobes are nonpolar molecules and generally exhibit a lengthened chain of carbons, which do not associate with the molecules of water.  

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."