In the Mechanism of Chymotrypsin, Which of the Following Amino

question 1

Multiple Choice

In the mechanism of chymotrypsin, which of the following amino acids found in the active site is correctly defined in terms of its role in the reaction?

• A)serine: hydrogen bonds with carbonyl oxygen to withdraw electron density from the substrate
• B)histidine: deprotonates aspartic acid to allow a nucleophilic attack to occur
• C)aspartic acid: electrostatic stabilization of histidine to make a stronger base
• D)cysteine: performs a nucleophilic attack on the carbonyl carbon of the substrate
• E)none of the above

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Definitions:

Infantile Amnesia

The inability of adults to recall memories from early childhood, typically prior to age 3 or 4.

Memory Decay

The gradual fading or weakening of memories over time due to non-use or passage of time.

Retrieval Failure

The inability to recall information from memory due to absence of cues or encoding problems.

Metamemory

An understanding about the processes that underlie memory, which emerges and improves during middle childhood.