AP Biology Unit 7 Review

Describe the orientation of the phospholipids in the membrane.

• Phospholipids orient in bilayer with hydrophilic heads on exterior

• Phospholipids orient in monolayer with hydrophilic head on extracellular

• Phospholipids orient in bilayer with hydrophobic tails on exterior

• Phospholipids orient in monolayer with hydrophobic tails on extracellular

Identify the pairing and number of bonds in DNA double helix

• A pairs with T (2 bonds) & G pairs with C (3 bonds)

• A pairs with G (2 bonds) & T pairs with C (3 bonds)

• A pairs with T (3 bonds) & G pairs with C (2 bonds)

• A pairs with G (3 bonds) & T pairs with C (2 bonds)

What component of the current polypeptide is the next amino acid added to, forming the peptide bond?

• amino group

• hydrogen

• carboxyl group

• R groups

DNA and RNA differ on many qualities, which of the following is NOT a difference?

• Sugar

• Nitrogenous Base

• Phosphate Group

• Strandedness

What macromolecule makes up the cell membrane's lining?

• Saturated Fatty acid chains

• Phospholipids

• Polypeptide chains

• Cellulose polysaccharide Chains

Which of the following is correctly defined as the attraction of the hydrogen from one molecule to the oxygen of a different molecule?

• amphipathic

• hydrophobic

• hydrogen bonding

• adhesion

What determines the function of a protein?

• The number of peptide bonds

• The types of side chains

• The protein’s specific structure

• The tissue that produces the protein

Tags

NGSS.HS-LS1-1

Which of the following does not result from hydrogen bonding in water molecules?

• Cohesion

• Adhesion

• Surface Tension

• Dissolving fats

Tags

NGSS.HS-ESS2-5

Why is water considered polar?

• Nonpolar covalent bonds in structure

• Ionic bonds in structure

• Polar covalent bonds in structure

• Hydrophobic interaction in structure

Which macromolecule(s) have nitrogen?

• Carbohydrates

• Proteins

• Nucleic Acids

• Nucleic Acids & Proteins