Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements:
(1) Partial hydrolysis of the tripeptide Ala-Gly-Cys produces three different dipeptides.
(2) The number of standard amino acids is 23.
(3) Enkephalins are peptides that bind at receptor sites in the brain to reduce pain.

Question

Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: 
(1) Partial hydrolysis of the tripeptide Ala-Gly-Cys produces three different dipeptides.
(2) The number of standard amino acids is 23.
(3) Enkephalins are peptides that bind at receptor sites in the brain to reduce pain.

Quizplus · Accepted Answer

Statement 1 is FALSE because partial hydrolysis of the tripeptide Ala-Gly-Cys would produce only two different dipeptides: Ala-Gly and Gly-Cys. Statement 2 is FALSE because there are 20 standard amino acids, not 23. Statement 3 is TRUE because enkephalins are indeed peptides that bind to receptor sites in the brain to reduce pain.

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