Carbohydrates, lipids -- also known as fats -- nucleic acids, and proteins are the four major classes of biomolecules, or molecules that form the structural and functional components of cells. Each of these types of molecules consists of a carbon skeleton, or backbone, explain Drs.
Teen Mom Kailyn Lowry and her boyfriend Javi Marroquin are expecting their first child together. Credit: INFphoto.com. Kailyn Lowry is ready for baby No. 2! The Teen Mom 2 star is expecting her first child with husband Javi Marroquin, multiple sources confirm to Us Weekly. Kail is pregnant, a source confirms to Us.
Jessica Biel's baby bump was on full display as she left a meeting Credit: Interstar/Dean/NPG.com. Jessica Biel âs bump is officially impossible to hide! The pregnant star stepped out in West Hollywood, Calif., on Wednesday, Jan. 7, and her baby bump was on full display. PHOTOS: Jess and Justin through the years.