All proteins have a primary structure. fibrous and globular proteins have a secondary structure: α helix or β pleated. globular proteins also have a tertiary structure due to interactions of amino acid side chains with water. most globular proteins, including hemoglobin also have a quaternary structure. which of these structures is due to h bonding between amino acid chains?

"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."

they dont have any evidence

the answer is c because it is most logical.