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.
EXCLUSIVE: Caitlyn Jenner Visits 'Young and the Restless' Set as BFF Candis Cayne Guest Stars. Caitlyn Jenner's BFF, actress Candis Cayne, dished to ET about changing society's perspective on the transgender community. Cayne is appearing on The Young and the Restless on Wednesday as a wedding planner for Abby and Stitch's upcoming nuptials.