Final Exam Chapter 2

Question 1

Carbohydrates

Answer 1

Simple sugars and polysaccharides

Polysaccharides store sugar, structural components of a cell and markers for cell recognition processes

Question 2

Lipids

Answer 2

• Principal components of cell membrane
• Energy storage and signaling
• 2 hydrophilic fatty acid chains and 1 hydrophobic phosphate head

Question 3

Nucleic Acids

Answer 3

• Principal information molecules of cells
• DNA&RNA
• Hydrogen bond allow for cell replication

Question 4

Proteins

Answer 4

• Polymer of 20 different amino acids
• 3 dimensional structure
• Combinations of A helices and B sheets that fold into globular domains

Question 5

Membrane Lipids

Answer 5

• Basic structure of all membranes in a phospillipid bilayer

- Animal cells contain glycolipids and cholesterol

Question 6

Membrane proteins

Answer 6

• Inserted into lipid bilayer

- Anchored to one side

Question 7

Transport across cell membrane

Answer 7

-Lipid bilayers are permeable to small-uncharged molecules

Ions and polar molecules use transport proteins with hydrolysis or ATP