Biochemistry 2280A Chapter Notes - Chapter 56-58, 76-77, 171-179, 184-190, 225: Thymine, Arginine, Gene Expression
Get access
Related Documents
Related Questions
For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once. Proteins are ______________ built from amino acids, which each have an amino group and a _____________ group attached to the central _______________. There are twenty possible _______________ that differ in structure and are generally referred to as âR.â In solutions of neutral pH, amino acids are _______________, carrying both a positive and negative charge. When a protein is made, amino acids are linked together through _______________, which are formed by condensation reactions between the carboxyl end of the last amino acid and the ___________________ end of the next amino acid to be added to the growing chain.
a: amino | b: ionized | c: polypeptides |
d: alpha-carbon | e: length | f: protein |
g: carbon | h: noncovalent | i: R group |
j: carboxyl | k: peptide bonds | l: side chains |
m: hydroxide
1. A sequence of amino acids in a certain protein is found to be â Ser â Gly â Pro â Gly â
The sequence is most probably part of a(n):
a. beta turn
b. antiparallel beta sheet
c. alpha-helix
d. parallel beta-sheet
e. alapha-sheet
2. Which statement about peptides bonds is NOT TRUE?
There is perfectly free rotation about the peptide bond. | |||||||||||
The peptide bond has partial double-bond character. | |||||||||||
The peptide bond is shorter than a normal carbon-nitrogen single bond. | |||||||||||
The peptide bond usually has a trans configuration with respect to the alpha-carbons of the two amino acids involved in the peptide bond. | |||||||||||
Peptide bonds are made via condensation of an amine and a carboxylic acid with loss of water. 3. Which of the following statements about proteins is FALSE?
|