Chapter 10: Give a general description and explaination of the following: How is

Question

Chapter 10: Give a general description and explaination of the following:

How is molecular/chemical structure related to storage, (cellular/organismal) structure, and signaling functions of lipids?

What are key structural features of common lipids? How are fatty acids abbreviated? What are key structural features of fatty acids?

What are membranes made of? What is the importance of membranes? How do solutes cross membranes? Are all membranes the same/homogenous?

How do proteins help metabolites cross membranes? What’s the role of free energy?

Explanation / Answer

How is molecular/chemical structure related to storage, (cellular/organismal) structure, and signaling functions of lipids?

Because of their ability to form bilayers, lipids are ideal biomolecules to create a barrier(or fence) that sperates the interior of the cell from the external environment

What are key structural features of common lipids? How are fatty acids abbreviated? What are key structural features of fatty acids?

They have a long hydrophobic tail and a hydrophillic head.

POPC is a phosphatidylcholine ; DPPC: Dipalmitoylphosphatidylcholine

a fatty acid consisting of a hydrocarbon chain and a terminal carboxyl group. they usually contain even number of carbons

What are membranes made of? What is the importance of membranes? How do solutes cross membranes? Are all membranes the same/homogenous?

Membranes are made up of lipid molecules which form bilayers. Membranes provide a cell to survive on its own. Small molecules can diffuse through membranes, while to transport biggers molecules or charged particles like ions, specialized proteins are needed, called membrane proteins or transmembrane proteins

How do proteins help metabolites cross membranes? What’s the role of free energy?

If transport of solutes is along the concentration gradient (from high concetration to low concentration, it is called passive trasnport. Active Transport uses ATP to pump molecules AGAINST/UP the concentration gradient. Transport occurs from a low concentration of solute to high concentration of solute.

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