AP Bio - Unit 1 Test

Front

What is the primary structure of a protein?

Back

The primary structure of a protein is the linear sequence of amino acids linked by peptide bonds.

Front

What is the secondary structure of a protein?

Back

The secondary structure of a protein refers to the local folding of the polypeptide chain into structures such as alpha helices and beta sheets, stabilized by hydrogen bonds.

Front

What is adhesion in the context of water?

Back

Adhesion is the attraction between water molecules and other substances, such as glass, which allows water to 'stick' to surfaces.

Front

What is cohesion in the context of water?

Back

Cohesion is the attraction between water molecules due to hydrogen bonding, which allows water to form droplets.

Front

What are the two functional groups always found in amino acids?

Back

The two functional groups always found in amino acids are the carboxyl group (-COOH) and the amino group (-NH2).

Front

What is an ionic bond?

Back

An ionic bond is a type of chemical bond formed through the transfer of electrons from one atom to another, resulting in oppositely charged ions that attract each other.

Front

What is the role of RNA in cells?

Back

RNA (ribonucleic acid) plays a crucial role in coding, decoding, regulation, and expression of genes.

Front

What is the difference between DNA and RNA?

Back

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

Front

What is a hydrophilic molecule?

Back

A hydrophilic molecule is one that is attracted to water and can dissolve in it, often containing polar or charged groups.

Front

What is a hydrophobic molecule?

Back

A hydrophobic molecule is one that repels water and does not dissolve in it, typically composed of nonpolar groups.