AP Biology: Unit 1 Review (CED)

Front

What is the orientation of phospholipids in a cell membrane?

Back

Phospholipids orient in a bilayer with hydrophilic heads on the exterior and hydrophobic tails on the interior.

Front

What type of protein structure involves R group bonding to form the final three-dimensional structure?

Back

Tertiary structure.

Front

Which macromolecule contains sulfur?

Back

Proteins.

Front

In which direction is DNA/RNA synthesized?

Back

New nucleotides are added to the 3' hydroxyl end.

Front

What component of a polypeptide is involved in forming a peptide bond with the next amino acid?

Back

Carboxyl group.

Front

What is the primary function of phospholipids in biological membranes?

Back

To form a barrier that separates the interior of the cell from the external environment.

Front

What are the four main types of macromolecules in biology?

Back

Carbohydrates, Proteins, Nucleic Acids, and Lipids.

Front

What is the basic unit of proteins?

Back

Amino acids.

Front

What is the role of the R group in amino acids?

Back

The R group determines the properties and identity of the amino acid.

Front

What is the difference between DNA and RNA in terms of structure?

Back

DNA is double-stranded and contains deoxyribose, while RNA is single-stranded and contains ribose.