The four main categories of large biological molecules present in living systems are __________.

Which feature of phospholipids is the most critical to their ability to form bi-layers in cell membranes?

Which organelle plays a role in intracellular digestion? 

Which structure is common to plant and animal cells? 

Part complete Molecules that have the same chemical formula (same numbers of each type of atom) but different three-dimensional shapes are called __________.

Which organelle is associated with ribosomes?

Plant cell walls consist mainly of __________. 

Which concept explains why mitochondria, nuclei, and chloroplast have double membrane?

In a fat, three fatty acids joined together by glycerol in known as a triglyceride.

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