Question

• what makes amino acids different?
• amino acids form: ______________ (2 amino acids)

______________ (long chain of amino acids)

• in a condensation reaction, 2 amino acids form a covalent bond called a ____________. this bond produces ____________.

1. enzymes:

• what are enzymes?
• enzyme reactions depend on a physical fit between the enzyme molecule and its ______________.
• draw a lock and key model of enzyme action (fig. 3-13)

Explanation:

Amino acids differ by their side - chains (R - groups). Two amino acids form a dipeptide. A long chain of amino acids forms a polypeptide. In a condensation reaction between two amino acids, a peptide bond is formed and water is produced. Enzymes are biological catalysts (usually proteins). Enzyme reactions depend on a physical fit between the enzyme molecule and its substrate. The lock - and - key model shows the specific binding of an enzyme to its substrate.

Answer:

• What makes amino acids different? Side - chains (R - groups)
• Amino acids form: Dipeptide (2 amino acids), Polypeptide (long chain of amino acids)
• In a condensation reaction, 2 amino acids form a covalent bond called a Peptide bond. This bond produces Water.
• What are enzymes? Biological catalysts (usually proteins)
• Enzyme reactions depend on a physical fit between the enzyme molecule and its Substrate
• (Drawing of lock - and - key model of enzyme action is not possible to provide in text format but conceptually, the enzyme is the lock and the substrate is the key with a specific shape complementarity)