Which of the following has been associated with atherosclerosis and should be eliminated from one’s diet for health reasons? 

Cholesterol are lipids characterized by a carbon skeleton consisting of four fused rings

Variations in the reactive properties of different organic molecules are most closely associated with __________. 

Plant cell walls consist mainly of __________. 

The large diversity of shapes of biological molecules is possible because of the extensive presence of __________ in the molecules. 

Most organic compounds contain which atoms? 

Which of the following statements best describes one major difference between prokaryotic cells and eukaryotic cells? 

Which of the following organelles is found in plant cells only?

Which of the following organelles is where most of the DNA is stored?

What is an unidirectional ultraclean delivery system that directs air away from the sterile field during surgery?