Regarding the Structures of Amino Acids, Which, If Any, of the Following

question 35

Multiple Choice

Regarding the structures of amino acids, which, if any, of the following statements is incorrect?

• A) The general formula for a nonionised amino acid is H₂N-CH(R)-COOH, that is, a central carbon atom is linked to an amino group, a carboxyl group, a hydrogen atom, and a side chain, R.
• B) The identity of the amino acid is determined by the side chain that is connected to the central carbon atom.
• C) The side chain of an amino acid is based on a branch that contains one or more carbon atoms
• D) Proline is unique in having a side chain that is connected to both the central carbon and also to the nitrogen atom of the amino group.

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Definitions:

Low

Typically refers to a state or condition of minimal magnitude or intensity, such as low voltage or low frequency.

Start Winding

A winding in a motor that is used during the start-up phase to create an initial rotating magnetic field.

Split-phase Motor

A type of single-phase induction motor that uses two windings, a start and run winding, to create a phase shift for starting torque.

Stator Core

The stationary part of an electric motor or generator, consisting of laminated silicon steel, that supports the winding where the magnetic field is produced.