Question 14 protein molecules a. are made up of amino acids linked together by peptide bonds. b. include enzymes that serve as catalysts in a biological reactions. c. serve both structural and funtional roles in the body. d. all of these are correct

What happens when the cell copies its chromosomes

Which structure in the cardiovascular system connect arteries to veins?

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes