Tuftsin Is a Peptide That Stimulate and Promotes the Destruction

question 41

Multiple Choice

Tuftsin is a peptide that stimulate and promotes the destruction of tumor cells. Its primary structure is Thr-Lys-Pro-Arg. Which statement is NOT a valid interpretation of its primary structure?

• A)It is a tetrapeptide.
• B)Threonine is the N-terminal amino acid and arginine is the C-terminal amino acid.
• C)The amino group of arginine is not joined to any other amino acid.
• D)The carboxyl group of lysine is joined to the amino group of proline.

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Definitions:

Vitamin B

A group of water-soluble vitamins that play significant roles in cell metabolism.

Thiamine

A water-soluble B vitamin (B1) essential for glucose metabolism and normal nerve, muscle, and heart function.

Amenorrhea

Absence of menses; without menstruation.

Menses

The monthly bleeding or menstrual period in women and individuals with a menstrual cycle, part of the reproductive cycle.