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.
Baby bump alert: Rosamund Pike's pregnant with baby No. 2. For Cailyn Cox, writing isn't just a hobby, it's her life. Passionate about Hollywood, she makes it her mission to find the most entertaining celebrity gossip for SheKnows readers. And when she's not enthralled in the celeb world, she's ...