BIO 181 Unit 2 Review

What are the parts of a phospholipid?

• Polar head; nonpolar steroid tails

• Nonpolar head; polar steroid tails

• Polar head; nonpolar fatty acid tails

• Nonpolar head; polar fatty acid tails

This is a structure with sugar and lipid embedded in the plasma membrane. What is it called?

• Glycoprotein

• Glycolipid

• Glycolytic Protein

• Glycogen Lipid

What makes the head of a phospholipid "polar"?

• Carboxyl Group

• Hydroxyl Group

• Phosphate Groups

• Amino Group

This structure (F) has a short-chain sugar (oligosaccharide) and protein embedded in the plasma membrane. What is this structure called?

• Glycoprotein

• Glycolipid

• Glycogen Lipid

• Glycolytic Protein

What molecule is this pointing to in the membrane?

• Fat

• Cholesterol

• Phospholipid

• Protein

Why are cholesterol molecules embedded inside the membrane and not the outside?

• Cholesterol is nonpolar, just like the fatty acid tails

• Cholesterol is nonpolar, just like the heads

• Cholesterol is polar, just like the fatty acid tails

• Cholesterol is polar, just like the heads

What happens to proteins under high temperatures?

• Protein loses function

• Protein denatures

• Both of these

How are the amino acids joined together in the primary structure of a polypepide chain?

• Covalent Bonds

• Ionic Bonds

• Glycosidic Bonds

• Hydrogen Bonds

What is diffusion?

• Movement of solutes from low to high concentration

• Movement of water from low to high concentration

• Movement of solutes from high to low concentration

• Movement of water from high to low concentration