1. In a 0.1 m solution of glycine at pH 9.0. what fraction of glycine has its amino group in the –NH3+ form?

Why are nearly all amino acids in organisms left-handed(exception is glycine which has no isomer) when abiotic samplestypical have an even mix of left- and right-handed molecules?

For an α-helical polyalanine peptide 45.00 residues in length, calculate the melting temperature in °C. Tm= °C

Calculate the melting temperature of a 45.00 amino acid α-helical peptide if that peptide contains all alanines and a single internal glycine residue. Tm= °C

Calcuate the melting temperature if the 45.00 amino acid α-helical peptide contains 5.00 internal glycine residues and a glycine at the N-terminus of the helix. Tm= °C

Calculate the melting temperature for a 45.00 amino acid polyhistidine peptide at physiological pH in a 310-helix. Tm= °C

If the base sequence of a mRNA is 3'UCAGAUCGGUAAGGU5', it hashow many codons?

a. 4 b. 5 c. 6 d. 7 e. 0

Based on the above mRNA sequence, the first amino acid coded foris __________

a. tryptophan b. lysine c. arganine d. valine

...The last amino acid coded for is ______

a. valine b. serine c. stop code d. start code e. threonine

...The second amino acid coded for is ______

a. valine b. asparagine c. lysine d. glycine

...The third amino acid coded for is ______

a. glycine b. valine c. proline d. stop code