A(n) ______ contains more than 10 amino acids, but a(n) ______ has more than 100 amino acids.

Choose the best answer.

Because there are more codons than amino acids,

a. some amino acids are specified by more than one codon.

b. some codons specify more than one amino acid.

c. some codons do not specify any amino acid.

d. some amino acids do not have codons.

Make a frequency table for the data, and find the mean. ages (in years) of members of the swim team: 14, 15, 17, 17, 18, 16, 15, 14, 16, 17, 17, 18, 17, 16, 16, 15, 14, 17 mean: ___________

$$\begin{matrix} \text{Age(years)} & \text{Tally} & \text{Frequency}\\ \text{14}\\ \text{15}\\ \text{16}\\ \text{17}\\ \text{18}\\ \end{matrix}$$

What should you call a chain of eight amino acids? A chain of 200 amino acids?

In some proteins, the side chain of serine appears to undergo ionization. Explain why ionization would be facilitated by the presence of an aspartate residue nearby.

The $20$ standard amino acids are called $\alpha$-amino acids. Certain $\beta$-amino acids are found in nature. Draw the structure of $\beta$-alanine ($3$-amino- $n$-propionate).

Explain why amino acids are insoluble in diethyl ether but N-acetyl amino acids are soluble.

The formula for peptides is written so that the free _____ group is on the left end and the free _____ group is on the right end.

The surface area of a square pyramid is 85 square meters. The base length is 5 meters. What is the slant height?

The population of River City in the year 1910 was 4200. Assume the population increased at a rate of 2.25% per year. Estimate the population in 1930 and 1945.

Why does the inequality symbol need to be reversed when multiplying or dividing by a negative number?

Which of the following is true of the peptide bond?

A. It is able to rotate.
B. It attaches the carboxyl group of one amino acid to the carboxyl group of a second amino acid.
C. It is a covalent bond formed via a condensation reaction.
D. It attaches the amino group of one amino acid to the group of a second amino acid.

Explain why this technique of graphing a system of equations or inequalities works to solve exponential equations and inequalities.

Solve each quadratic inequality by using a graph, a table, or algebraically.

$$-3x^2+10x<5$$